'''Bitte beachten Sie, dass Sunbird im Gegensatz zu Lightning nicht mehr gewartet wird'''. Die er dennoch von vielen Menschen genutzt wird, sind die Hilfeteile hier weiterhin verfügbar. __TOC__ = Allgemein = == Was ist der Unterschied zwischen Sunbird und Lightning? == [http://www.mozilla.org/projects/calendar/sunbird Sunbird] ist unsere alleinstehende Kalender-Anwendung. Sie braucht auf Kosten einer höheren Download-Größe und mehr Speicherverbrauch kein anderes Programm, um ausgefürt werden zu können. Aufgrund der Alleinstehend bietet Sunbird keine vollständige Integration in E-Mail-Programme wie [http://www.mozilla.com/thunderbird/ Mozilla Thunderbird]. Es bietet Kalender-Funktionalität direkt in der Thunderbird-Benutzeroberfläche. Weitere Integrations-Funktionen wie E-Mail-Einladungen oder Adressbucheinbindung sind auch für die Zukunft '''nicht''' geplant, da es nicht mehr unterstützt wird. '''Verwenden Si bitte Lightning statt Sunbird'''. ==Was brauche ich zur Installation von Lightning? == You need a current version of Thunderbird, either 3.1 or higher. There are also Lightning versions for the latest nightly releases in the "Development Channel" section. Take a look at the [https://addons.mozilla.org/de/thunderbird/addon/lightning/ Lightning-Downloadseite]. If there is trouble, try installing Lightning before any other extensions. == Wie kann ich Lightning deinstallieren? == You can uninstall Lightning from the Add-on Manager in the Tools menu. == Sind Nightly-Builds sicher? == Nightly builds are test builds for developers. They are not intended for general use. Using nightly builds can result in crashes and loss of data. = Nutzung = == Gibt es eine Ferien-Funktion? == You can subscribe to [http://www.mozilla.org/projects/calendar/holidays.html holiday files]. == Kann ich sich wiederholende Ereignisse (z. B. am ersten Montag im August) erstellen? == Set the event to repeat every 12 months: In the new event dialog, set the start date to the first Monday of August of the first year, say 2012-08-06. Click the drop-down list next to "Repeat" and choose "Custom...", choose "yearly" in the drop-down list next to "Recurrence pattern", set the interval to 1 year, and set the other options to "First Monday of August". == Wie kann ich Termine auf einem Remote-Server veröffentlichen? == You can create your calendar on a calendar server that supports [https://wiki.mozilla.org/Calendar:QA_CalDAV_Support CalDAV] (englisch), or [https://wiki.mozilla.org/Calendar:WCAP_Guide WCAP] (englisch), or has a [https://addons.mozilla.org/de/sunbird/browse/type:1/cat:75?show=20&amp;exp=on&amp;sort=popular calendar] data provider add-on. CalDAV, WCAP and some add-on protocols permit a calendaring client such as Sunbird or Lightning to tell the server to modify individual events, and the servers prevent or detect overwriting changes by two people or programs. When you subscribe to a calendar using these methods, changes you make are saved back to the server one event or task at a time. You can also publish events from the calendar as a personal .ics file on an FTP server (Sunbird only) or a webDAV enabled web server. You can use the calendar to subscribe to these events as well. Since this method overwrites the entire file for each change, it is not for calendars modified by more than one person or program, nor for large calendars. == Wie kann ich meine geteilten Kalender anbieten? == One way is to store your calendar on a public calendar service. There are many; check with your email provider, or search the web. Some store only whole ics files modified by a single user, while others provide a service with a more robust calendaring protocol such as CalDAV (or WCAP), to better handle through large calendars and changes by multiple users. To serve shared calendars from your own server machine, the best way is to install a service specifically designed to manage calendars, typically using a protocol such as [https://wiki.mozilla.org/Calendar:QA_CalDAV_Support CalDAV] (englisch), or [https://wiki.mozilla.org/Calendar:WCAP_Guide WCAP] (englisch). Both open source and commercially supported calendar service packages are available. If only one person or program will modify a small calendar, you can use a [http://www.webdav.org WebDAV-Server] (englisch). If you run your own web server, you can install [http://www.webdav.org/mod_dav mod_dav] (englisch), a free Apache module that will turn your web server into a webDAV server. Instructions on how to set it up are on their website. Once you set up your webDAV server, you can publish your calendar to the site, then subscribe to it from any other Calendar. Automatically updating the calendar will give you a poor man's calendar server. == Kann Sunbird/Lightning geschlossen erinnern? Kann Sunbird minimiert starten? == No, Sunbird and Lightning can't give pop-up messages or send e-mails when they are not running. However, there is a 'trick' for this problem: you can hide Sunbird in the tray. This can be done with [http://users.dart.net.au/~srgeorg/ Suntray] (englisch) oder [http://minimizetotray.mozdev.org/ Minimize to Tray] (englisch) for Windows and [http://kdocker.sourceforge.net Kdocker] (englisch) for Linux. = Import & Export = == Was ist das Dateiformat für Sunbird oder Lightning? == Sunbird/Lightning uses a SQL-based storage mechanism based on [http://www.sqlite.org SQLite] (englisch). Local calendar files have the file suffix .sdb and can be found in the profile directory. Sunbird/Lightning can also work with files based on the [http://www.ietf.org/rfc/rfc2445.txt iCal-Standard] (englisch). These files have the .ics file suffix and can be opened, imported, exported and subscribed to. == Funktioniert es mit Outlook? == Outlook does not store its calendar data in an open standard format, so Calendar and Sunbird currently do not support Outlook directly. However, you may be able to export your Outlook events as an .ics or .csv file, and import them into Sunbird or Lightning using the "Calendar Files" or "Outlook Comma Separated" file type, respectively. Linux-Nutzer finden vielleicht [http://outport.sourceforge.net/ diese Seite] (englisch) nützlich. (Follow [https://bugzilla.mozilla.org/show_bug.cgi?id=167102 Bug 167102] for more details on Outlook integration.) == Funktioniert es mit Suns Kalender-Server? == In the New Calendar dialog select "On the Network" and then the "WCAP" calendar type. Provide a URL of the calendar server of the form "https://servername.com/" or "https://username@servername.com/" in the "Location" field. See also the [https://wiki.mozilla.org/Calendar:WCAP_Guide WCAP-Anleitung] (englisch). == Funktioniert es mit Apples iCal? == iCal and Calendar use the same file format, so events from one should show up without problems in the other. You can also subscribe to the [http://www.apple.com/ical/library/ Terminliste auf Apples Website] (englisch) if you like. Please note that iCal is currently not capable of cooperatively editing a calendar file on a webDAV or ftp server. iCal will overwrite any changes made from a different application (like Sunbird or Lightning) on such a file. == Synchronisiert es mit Palm? == Der Kalender kann derzeit nicht mit Palm synchronisiert werden. == Warum werden nach dem Importieren einer Kalender-Datei keine Termine angezeigt? (Es scheint alle Elemente zu importieren, zeigt jedoch keine Ereignisse.) == Sounds like your default calendar might be set to not visible (in the Calendars tab). There is a [https://bugzilla.mozilla.org/show_bug.cgi?id=237311 Bug] that sets a non-visible calendar to visible for a short time while adding a new event to that calendar. The events are drawn to view during that time, but when you click one of the events the calendar is not available, and a crash results. In short: check if your default calendar is visible. = Konfigurieren & Anpassen = == Wie kann ich das Datumsformat umstellen? == The Long date format and Short date format are defined by the local operating system so date formats are consistent across the screen. In Windows 2000/XP, see Start | Settings (Win 2000) | Control Panel | Regional Options | Customize... (Win XP) | Date (tab).<br> In Windows Vista/7, see Start | Control Panel | Clock, Language and Region | Region and Language | Additional Settings... | Date (tab). You can choose between the Long date format or Short date format in the calendar preferences to control how dates appear in tables and exported text. == Wie kann ich den Alarm-Klang ändern? == It is packed in the calendar.jar file in your applications chrome directory. The filename is sound.wav. You have to unpack calendar.jar with a zip program (like WinZip), change sound.wav and repack it. == Wie kann ich Termine einfärben? == You can create calendar files for different kinds of events and give each file a different color. == Wie kann ich auf lokale Kalender von Sunbird oder Lightning gleichzeitig zugreifen? == * Sunbird: Use "File | New Calendar..." to create a new local file in one program, and "File | Open Calendar File" to open the same local file from the other program. * Lightning: Use "File | New | Calendar..." to create a new local file in one program, and "File | Open | Calendar File..." to open the same local file from the other program. This is intended for viewing the same local calendar from two programs, not for editing a shared calendar. Be careful not to add or edit any events or tasks in the same calendar file from two program instances simultaneously, or you may lose changes when the file is overwritten. (If you must live dangerously, refresh before editing.) An example in more detail: * Create a local calendar within the first program, say Lightning. *#To create a new local file, by using a "file://" URL: *#From the "File" menu, choose "New | Calendar..." *#Select "On the Network", and click "Next" (NOT "On My Computer", which creates calendars stored in a local SQLite database.) *#Select "iCalendar (ICS)" (default), and enter a file: URL to the local file. On MS-Windows operating systems it may be something like: "file:///C:/Documents and Settings/USERNAME/MyCal.ics". *#Click "Next". *#Edit the name and color if desired. *#Click "Next". *#Click "Finish". *#In the left sidebar, the calendar is added to the Calendar list (click '+' if it is collapsed), but the MyCal.ics file won't appear on disk until you add an event or task to it. *#In the "Calendar" list, click to select the new calendar "MyCal" so just its line is on a different color background. (The checkbox should remain on.) *To add a new event, click the "New Event" toolbar button (or in the "File" menu, click "New Event..."). In the event dialog, enter a title, say "My Lunch". *Click "Save and Close" to save it. *To verify where the calendar is stored: In the "Calendar" list, click-right on the calendar name "MyCal.ics" and click "Properties". Note the location file path. Click "OK". *To verify that the event "My Lunch" has been stored in that file, "MyCal.ics", view "MyCal.ics" in a text editor to check that an event with the title "My Lunch" has been added to that file. *Open the local calendar from the second program, say Sunbird. *To open the file: *#In the Calendar "File" menu, click "Open Calendar File..." *#In the file browser, locate the same file. *#You should see the event "My Lunch" that you added from Lightning. *In Sunbird, add a task to the same file titled, say, "My Workout", and click "Save and Close". *Refresh the other program's memory of the calendar from the local file. *Find the program's "Calendar" list in Lightning. *Toggle the calendar "MyCal" checkbox off and then on again. Events or tasks added from Sunbird like "My Workout" should appear. = Beim entwickeln von Sunbird/Lightning helfen = == Wie kann ich die Benutzeroberfläche verändern oder ausbessern? == Die GUI ist written in [http://www.xulplanet.com/ XUL], [http://devedge-temp.mozilla.org/library/manuals/ JavaScript], and [http://www.w3.org/Style/CSS/#specs CSS], with [http://xulplanet.com/tutorials/xultu/locale.html DTDs] and [http://xulplanet.com/tutorials/xultu/locprops.html properties files] for localized text. They are all contained in the <code>chrome/calendar.jar</code> in the user profile extensions directory (Firefox, Thunderbird). <br><br>On Linux, the profile extensions path is probably something like <code>~/.mozilla/thunderbird/default.xxx/extensions/{8e117890-a33f-424b-a2ea-deb272731365}/chrome/calendar.jar</code>. The application directory path is probably something like <code>/usr/local/sunbird/chrome/calendar.jar</code>. <br><br>On Windows, the profile extensions path is probably something like <code>C:\Documents and Settings\(user)\Application Data\Mozilla\thunderbird\Profiles\default.xxx\extensions\{8e117890-a33f-424b-a2ea-deb272731365}\chrome\calendar.jar</code>. The application directory path is probably something like <code>c:\Program Files\sunbird\chrome\calendar.jar</code>.<br><br>Unzip the <code>calendar.jar</code>. It contains three directories: <code>content, locale, skin</code>.<br><code>content</code>: XUL and JS define the components and event handlers. [http://xulplanet.com/tutorials/xultu/introxbl.html XBL] files contain both XUL and JS. <br><code>locale</code>: DTD and properties define the text for each locale. <br><code>skin</code>: CSS and images define the look for each default theme. To make a change: #Unzip the <code>calendar.jar</code>, #Edit files, #Pack it back up into <code>calendar.jar</code>, #Restart Lightning/Sunbird and test. That's it. Test with <code>javascript.options.strict</code> set to <code>true</code> to get JavaScript console warnings for common problems (open the URI <code>about:config</code> in the browser to set the preference).<br> <br>For fixing bugs, if files in the source code repository ([https://developer.mozilla.org/en/comm-central Comm-Central]) are more recent than the latest nightly build you're using, it is better to get files from the repository, edit, and pack them into the jar (note directory structure).<br> == Wo bekomme ich den neuesten Quelltext für Sunbird/Lightning? == The source for Sunbird/Lightning is in the [http://developer.mozilla.org/en/Comm-central_source_code_(Mercurial) comm-central Mercurial (hg) repository]. Follow the instructions on that page to get the source code. <br>You can also [http://mxr.mozilla.org/comm-central/source/calendar browse] or [http://mxr.mozilla.org/comm-central/search search] the source, or check what just [http://hg.mozilla.org/comm-central/ changed] in the comm-central repository.<br> == Wie erstelle ich Sunbird/Lightning? == Check out the [http://developer.mozilla.org/en/Comm-central_source_code_(Mercurial) source code] and the [https://developer.mozilla.org/en/Build_Documentation build documentation]. Accompanying information can also be found on the [http://www.mozilla.org/projects/calendar/sunbird/build.html Sunbird build page]. == Wie kann ich beim beheben von Fehlern helfen? == Check out the [http://www.mozilla.org/projects/calendar/bugs.html bugs page]. = Gemeinschafts-Diskussion/-Hilfe= == Wo befindet sich die Hilfe-Funktion in Sunbird/Lightning? == Sunbird and Lightning do not have a help function yet. There is a project ongoing which provides an extension for Sunbird. The extension can be found on their [http://calendarhelp.mozdev.org project page]. The same project also came up with an [http://calendarhelp.mozdev.org/open.xul online help]. == Welche Newsgruppe/Welches Forum diskutiert Sunbird und Lightning?== Two Sunbird-/Lightning-related newsgroups exist on the [http://news://news.mozilla.org news.mozilla.org] news server.<br> <strong>mozilla.support.calendar:</strong> This newsgroup is dedicated to users of Sunbird or Lightning. All user-related discussions (questions regarding the use of the product, tips and tricks, workarounds or enhancement requests) should be posted here.<br> <strong>mozilla.dev.apps.calendar:</strong> This newsgroup is dedicated to the current and future developers of Sunbird or Lightning. All developer-related discussions (how to best fix a particular bug, how to use a particular interface to extend the product or all discussions regarding future product planning) should be posted here. <br>If you still need help, feel free to post a question in the [http://forums.mozillazine.org/viewforum.php?f=46 MozillaZine Calendar Forum].

Bitte beachten Sie, dass Sunbird im Gegensatz zu Lightning nicht mehr gewartet wird. Die er dennoch von vielen Menschen genutzt wird, sind die Hilfeteile hier weiterhin verfügbar.

Allgemein

Was ist der Unterschied zwischen Sunbird und Lightning?

Sunbird ist unsere alleinstehende Kalender-Anwendung. Sie braucht auf Kosten einer höheren Download-Größe und mehr Speicherverbrauch kein anderes Programm, um ausgefürt werden zu können. Aufgrund der Alleinstehend bietet Sunbird keine vollständige Integration in E-Mail-Programme wie Mozilla Thunderbird. Es bietet Kalender-Funktionalität direkt in der Thunderbird-Benutzeroberfläche. Weitere Integrations-Funktionen wie E-Mail-Einladungen oder Adressbucheinbindung sind auch für die Zukunft nicht geplant, da es nicht mehr unterstützt wird. Verwenden Si bitte Lightning statt Sunbird.

Was brauche ich zur Installation von Lightning?

You need a current version of Thunderbird, either 3.1 or higher. There are also Lightning versions for the latest nightly releases in the "Development Channel" section. Take a look at the Lightning-Downloadseite. If there is trouble, try installing Lightning before any other extensions.

Wie kann ich Lightning deinstallieren?

You can uninstall Lightning from the Add-on Manager in the Tools menu.

Sind Nightly-Builds sicher?

Nightly builds are test builds for developers. They are not intended for general use. Using nightly builds can result in crashes and loss of data.

Nutzung

Gibt es eine Ferien-Funktion?

You can subscribe to holiday files.

Kann ich sich wiederholende Ereignisse (z. B. am ersten Montag im August) erstellen?

Set the event to repeat every 12 months: In the new event dialog, set the start date to the first Monday of August of the first year, say 2012-08-06. Click the drop-down list next to "Repeat" and choose "Custom...", choose "yearly" in the drop-down list next to "Recurrence pattern", set the interval to 1 year, and set the other options to "First Monday of August".

Wie kann ich Termine auf einem Remote-Server veröffentlichen?

You can create your calendar on a calendar server that supports CalDAV (englisch), or WCAP (englisch), or has a calendar data provider add-on. CalDAV, WCAP and some add-on protocols permit a calendaring client such as Sunbird or Lightning to tell the server to modify individual events, and the servers prevent or detect overwriting changes by two people or programs. When you subscribe to a calendar using these methods, changes you make are saved back to the server one event or task at a time.

You can also publish events from the calendar as a personal .ics file on an FTP server (Sunbird only) or a webDAV enabled web server. You can use the calendar to subscribe to these events as well. Since this method overwrites the entire file for each change, it is not for calendars modified by more than one person or program, nor for large calendars.

Wie kann ich meine geteilten Kalender anbieten?

One way is to store your calendar on a public calendar service. There are many; check with your email provider, or search the web. Some store only whole ics files modified by a single user, while others provide a service with a more robust calendaring protocol such as CalDAV (or WCAP), to better handle through large calendars and changes by multiple users.

To serve shared calendars from your own server machine, the best way is to install a service specifically designed to manage calendars, typically using a protocol such as CalDAV (englisch), or WCAP (englisch). Both open source and commercially supported calendar service packages are available.

If only one person or program will modify a small calendar, you can use a WebDAV-Server (englisch). If you run your own web server, you can install mod_dav (englisch), a free Apache module that will turn your web server into a webDAV server. Instructions on how to set it up are on their website. Once you set up your webDAV server, you can publish your calendar to the site, then subscribe to it from any other Calendar. Automatically updating the calendar will give you a poor man's calendar server.

Kann Sunbird/Lightning geschlossen erinnern? Kann Sunbird minimiert starten?

No, Sunbird and Lightning can't give pop-up messages or send e-mails when they are not running. However, there is a 'trick' for this problem: you can hide Sunbird in the tray. This can be done with Suntray (englisch) oder Minimize to Tray (englisch) for Windows and Kdocker (englisch) for Linux.

Import & Export

Was ist das Dateiformat für Sunbird oder Lightning?

Sunbird/Lightning uses a SQL-based storage mechanism based on SQLite (englisch). Local calendar files have the file suffix .sdb and can be found in the profile directory. Sunbird/Lightning can also work with files based on the iCal-Standard (englisch). These files have the .ics file suffix and can be opened, imported, exported and subscribed to.

Funktioniert es mit Outlook?

Outlook does not store its calendar data in an open standard format, so Calendar and Sunbird currently do not support Outlook directly. However, you may be able to export your Outlook events as an .ics or .csv file, and import them into Sunbird or Lightning using the "Calendar Files" or "Outlook Comma Separated" file type, respectively. Linux-Nutzer finden vielleicht diese Seite (englisch) nützlich. (Follow Bug 167102 for more details on Outlook integration.)

Funktioniert es mit Suns Kalender-Server?

In the New Calendar dialog select "On the Network" and then the "WCAP" calendar type. Provide a URL of the calendar server of the form "https://servername.com/" or "https://username@servername.com/" in the "Location" field. See also the WCAP-Anleitung (englisch).

Funktioniert es mit Apples iCal?

iCal and Calendar use the same file format, so events from one should show up without problems in the other. You can also subscribe to the Terminliste auf Apples Website (englisch) if you like.

Please note that iCal is currently not capable of cooperatively editing a calendar file on a webDAV or ftp server. iCal will overwrite any changes made from a different application (like Sunbird or Lightning) on such a file.

Synchronisiert es mit Palm?

Der Kalender kann derzeit nicht mit Palm synchronisiert werden.

Warum werden nach dem Importieren einer Kalender-Datei keine Termine angezeigt? (Es scheint alle Elemente zu importieren, zeigt jedoch keine Ereignisse.)

Sounds like your default calendar might be set to not visible (in the Calendars tab). There is a Bug that sets a non-visible calendar to visible for a short time while adding a new event to that calendar. The events are drawn to view during that time, but when you click one of the events the calendar is not available, and a crash results.

In short: check if your default calendar is visible.

Konfigurieren & Anpassen

Wie kann ich das Datumsformat umstellen?

The Long date format and Short date format are defined by the local operating system so date formats are consistent across the screen.

In Windows 2000/XP, see Start | Settings (Win 2000) | Control Panel | Regional Options | Customize... (Win XP) | Date (tab).
In Windows Vista/7, see Start | Control Panel | Clock, Language and Region | Region and Language | Additional Settings... | Date (tab).

You can choose between the Long date format or Short date format in the calendar preferences to control how dates appear in tables and exported text.

Wie kann ich den Alarm-Klang ändern?

It is packed in the calendar.jar file in your applications chrome directory. The filename is sound.wav. You have to unpack calendar.jar with a zip program (like WinZip), change sound.wav and repack it.

Wie kann ich Termine einfärben?

You can create calendar files for different kinds of events and give each file a different color.

Wie kann ich auf lokale Kalender von Sunbird oder Lightning gleichzeitig zugreifen?

• Sunbird: Use "File | New Calendar..." to create a new local file in one program, and "File | Open Calendar File" to open the same local file from the other program.
• Lightning: Use "File | New | Calendar..." to create a new local file in one program, and "File | Open | Calendar File..." to open the same local file from the other program. This is intended for viewing the same local calendar from two programs, not for editing a shared calendar. Be careful not to add or edit any events or tasks in the same calendar file from two program instances simultaneously, or you may lose changes when the file is overwritten. (If you must live dangerously, refresh before editing.)

An example in more detail:

• Create a local calendar within the first program, say Lightning.
  1. To create a new local file, by using a "file://" URL:
  2. From the "File" menu, choose "New | Calendar..."
  3. Select "On the Network", and click "Next" (NOT "On My Computer", which creates calendars stored in a local SQLite database.)
  4. Select "iCalendar (ICS)" (default), and enter a file: URL to the local file. On MS-Windows operating systems it may be something like: "file:///C:/Documents and Settings/USERNAME/MyCal.ics".
  5. Click "Next".
  6. Edit the name and color if desired.
  7. Click "Next".
  8. Click "Finish".
  9. In the left sidebar, the calendar is added to the Calendar list (click '+' if it is collapsed), but the MyCal.ics file won't appear on disk until you add an event or task to it.
  10. In the "Calendar" list, click to select the new calendar "MyCal" so just its line is on a different color background. (The checkbox should remain on.)
• To add a new event, click the "New Event" toolbar button (or in the "File" menu, click "New Event..."). In the event dialog, enter a title, say "My Lunch".
• Click "Save and Close" to save it.
• To verify where the calendar is stored: In the "Calendar" list, click-right on the calendar name "MyCal.ics" and click "Properties". Note the location file path. Click "OK".
• To verify that the event "My Lunch" has been stored in that file, "MyCal.ics", view "MyCal.ics" in a text editor to check that an event with the title "My Lunch" has been added to that file.
• Open the local calendar from the second program, say Sunbird.
• To open the file:
  1. In the Calendar "File" menu, click "Open Calendar File..."
  2. In the file browser, locate the same file.
  3. You should see the event "My Lunch" that you added from Lightning.
• In Sunbird, add a task to the same file titled, say, "My Workout", and click "Save and Close".
• Refresh the other program's memory of the calendar from the local file.
• Find the program's "Calendar" list in Lightning.
• Toggle the calendar "MyCal" checkbox off and then on again. Events or tasks added from Sunbird like "My Workout" should appear.

Beim entwickeln von Sunbird/Lightning helfen

Wie kann ich die Benutzeroberfläche verändern oder ausbessern?

Die GUI ist written in XUL, JavaScript, and CSS, with DTDs and properties files for localized text. They are all contained in the chrome/calendar.jar in the user profile extensions directory (Firefox, Thunderbird).

On Linux, the profile extensions path is probably something like ~/.mozilla/thunderbird/default.xxx/extensions/{8e117890-a33f-424b-a2ea-deb272731365}/chrome/calendar.jar. The application directory path is probably something like /usr/local/sunbird/chrome/calendar.jar.

On Windows, the profile extensions path is probably something like C:\Documents and Settings\(user)\Application Data\Mozilla\thunderbird\Profiles\default.xxx\extensions\{8e117890-a33f-424b-a2ea-deb272731365}\chrome\calendar.jar. The application directory path is probably something like c:\Program Files\sunbird\chrome\calendar.jar.

Unzip the calendar.jar. It contains three directories: content, locale, skin.
content: XUL and JS define the components and event handlers. XBL files contain both XUL and JS.
locale: DTD and properties define the text for each locale.
skin: CSS and images define the look for each default theme.

To make a change:

1. Unzip the calendar.jar,
2. Edit files,
3. Pack it back up into calendar.jar,
4. Restart Lightning/Sunbird and test.

That's it. Test with javascript.options.strict set to true to get JavaScript console warnings for common problems (open the URI about:config in the browser to set the preference).

For fixing bugs, if files in the source code repository (Comm-Central) are more recent than the latest nightly build you're using, it is better to get files from the repository, edit, and pack them into the jar (note directory structure).

Wo bekomme ich den neuesten Quelltext für Sunbird/Lightning?

The source for Sunbird/Lightning is in the comm-central Mercurial (hg) repository. Follow the instructions on that page to get the source code.
You can also browse or search the source, or check what just changed in the comm-central repository.

Wie erstelle ich Sunbird/Lightning?

Check out the source code and the build documentation. Accompanying information can also be found on the Sunbird build page.

Wie kann ich beim beheben von Fehlern helfen?

Check out the bugs page.

Gemeinschafts-Diskussion/-Hilfe

Wo befindet sich die Hilfe-Funktion in Sunbird/Lightning?

Sunbird and Lightning do not have a help function yet. There is a project ongoing which provides an extension for Sunbird. The extension can be found on their project page. The same project also came up with an online help.

Welche Newsgruppe/Welches Forum diskutiert Sunbird und Lightning?

Two Sunbird-/Lightning-related newsgroups exist on the news.mozilla.org news server.
mozilla.support.calendar: This newsgroup is dedicated to users of Sunbird or Lightning. All user-related discussions (questions regarding the use of the product, tips and tricks, workarounds or enhancement requests) should be posted here.
mozilla.dev.apps.calendar: This newsgroup is dedicated to the current and future developers of Sunbird or Lightning. All developer-related discussions (how to best fix a particular bug, how to use a particular interface to extend the product or all discussions regarding future product planning) should be posted here.
If you still need help, feel free to post a question in the MozillaZine Calendar Forum.