diff --git a/Calendar.md b/Calendar.md
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+Related, not added to WeKan yet:
+
+- https://terokarvinen.com/2021/calendar-txt/
+- https://news.ycombinator.com/item?id=43160226
+
 ### Create card
 
 At Calendar View, on Month when you click a date it will ask you if you want to create a new card and give its name. It then creates at first swimlane and at first list the card with the due date that it got from the date you clicked.