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Windows 10 reached EOS (end of support) on October 14, 2025. If you are on Windows 10, see this article.

Email and messaging

Kalender

Manage your calendar events and schedules.

In Engels

Using Thunderbird with Google Calendar

Adding a holiday calendar

Create a new event or task

Export and share a calendar

Changing calendar preferences

Lightning User Interface

Configuring Lightning

Work with events

Change the date or time of an event

Inviting Other People to Events

Create a recurring event

Create new calendars

Lightning Articles

Enable email invitations for CalDAV servers configured to do serverside scheduling

Calendar updates issues with Thunderbird

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