I use OneCalendar, it works with a lot of email/calendar hosts, looks good, and is very responsive.
Alternatively, Thunderbird has a calendar feature built-in.
(Edit) failed to see which community this was, OneCalendar is sadly not open source.
That sounds awesome, thanks for the suggestion!
Reminds me of this gem: https://lizengland.com/blog/2014/04/the-door-problem/
I think you mean this one?
https://xkcd.com/927/
I use OneCalendar, it works with a lot of email/calendar hosts, looks good, and is very responsive.
Alternatively, Thunderbird has a calendar feature built-in.
(Edit) failed to see which community this was, OneCalendar is sadly not open source.