Ask HN: Why don’t we have good Open Source Calendars?

There is a calendar integrated into Thunderbird [1][2] Or if you just wanted to see days/weeks/months in a table there is the cal command in Linux. cal or cal -3 or cal -y

[1] - https://www.thunderbird.net/en-US/calendar/

[2] - https://support.mozilla.org/en-US/products/thunderbird/calen...

Great story about an attempt to make just such a calendar[1].

[1] https://www.amazon.com/Dreaming-Code-Programmers-Transcenden...