Depends on how you set the calendar up. If it's a local calendar (which is the default) then it's stored only on your desktop and it doesn't synchronise with anything. If it's a calendar on the internet (e.g. a calendar associated with your email account) then you may be able to synchronise it across several machines. Free internet calendars which seem to work pretty well are offered by Google and Yahoo, I believe there are several others. Tell us more about your set up and your needs and we may be able to help further.

It is the calender of Thunderbird itself. I thought that if I use this emailprogramme, it will automatically synchronise on each device I install and use it on. Unfortunately it doesn't... Not my contacts, settings nor calender. I'm not a very technical person, I'm afraid...

Don't apologise for not being technical, there's nothing wrong in that. Most email providers these days offer accounts which use what's called the IMAP protocol. A feature of that protocol is that it does synchronise emails across different machines. So you can read and manage your emails on the desktop, and then if you log into the account with your laptop you'll see all your messages there. However that only applies to emails. The other aspects of an account -- contacts, calendar etc. -- don't necessarily synchronise in the same way. If your needs are fairly basic -- e.g. you only use your email for personal messages and you don't have a lot of mail anyway -- then you may not need to use email client software like Thunderbird at all. Most of the major email providers offer 'webmail', which is simply a web page (or pages) where you can read and write emails, manage your account and so on. You can access webmail from any machine that has an internet browser and it can be easier and more reliable than using client software. If you prefer using software like Thunderbird (which offers more functions than a typical webmail service) then you need an account with a provider that works well with it. Personally I have an account with Google and the email and calendar work fine in Thunderbird; I have read that the 'contacts' function works well too. I believe that Yahoo mail and calendar are also reliable but I don't know about contacts. There are probably other providers also, you'll need to do some research on line. Or you could just start another thread here and ask if provider X (your choice) has email, contacts and calendar that all synchronise well with Thunderbird: other people can then reply from their personal experience. I hope that's some help!

Thank you for your swift response. My provider does have such a webmail, but it's rather limited and I was used to using Windows live. But they finished this, so I read this programme was a lot like Windows Live, with all the trimmings on it, thus a good substitute. My mail in itself isn't really a problem, except for the settings I made for it. I also have an account with Google, but I rarely use it. Anyway, I'll have a look around again to see if I can get to work with the calender Google provides. Thank you for trying to help me.