The email client Thunderbird, from Mozilla, is awesome. I’ve used it for years and recommend it to anyone who doesn’t want to use “WebMail”. A very useful “add-on” to Thunderbird (T Bird) is the integrated calendar “Ligthtning” but if you have a gmail (googlemail) email address, you can use the additional add-on “Provider for Google Calendar” to have bidirectional access to your Google Calendar. This add-on has recently been re-written from the ground up by it’s author, Philipp Kewisch, to make use of the Google API’s. It’s had a few problems but it does now work again as good as before and if you’re lucky, it will just pick up your settings and just work. If it doesn’t work, try the following:-
1. Delete the calendar that doesn’t work, then restart T Bird.
2. Add the calendar back but note, you don’t use the “xml” link given in your Google calendar settings. It’s now much easier, all you have to do is insert your gmail address and it will then offer a selection of calendars that you use.
3. Just tick/select what you want, click finish and you will get your Google Calender.
4. If you have access to a shared calendar, maybe a family member, you might find it better to add this separately by adding the Gmail address of that person or persons; other wise the calendar might be added as read only!
Add a Calendar to T Bird:-