This topic was originally in the Windows forum, but it was suggested to repost it here due to the open source nature of the question:
I'm looking for Calendar software for my Windows 8 PC, for a while I considered Thunderbird because it has the Lightning extension which is iCal compatible (for moving my iCal data from my old Macbook). Unfortunately it looks like Mozilla won't be supporting Thunderbird much in the future:
https://en.wikipedia.org/wiki/Mozilla_Thunderbird
Open source software is preferred, so can anyone recommend a iCal compatible open source calendar program running on Windows 8?
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