From Nookipedia, the Animal Crossing wiki

I believe something is wrong with the birthdays on the calendar as for all subsequent months. How do you fix this? like for instance, we all know April Fool's Day is on April 1st, not March 29. -User:Teanix

It's something that has happened due to the update with the Template:Calendar. I've tried to fix it, but it just doesn't seem to be working for me.
I'll try to contact sunmarsh and figure out how to fix the problem. -- PanchamBro (talkcontributions) 05:50, February 3, 2021 (EST)
The issue is with Template:CalFillApril and all other CalFill templates with the exception of January and February. Once I made the changes to Template:Calendar it messed up the positioning of the events. If someone would like to attempt to convert the remaining months you can see the changes made to January and use that as a guide: here. Otherwise I'll try and get to it later this week. Sunmarshsignature.png (talk) 16:38, February 3, 2021 (EST)
And done. Besides Template:CalFillAugust (which me and sunmarsh might need to investigate), the calendars should be correct now. Happy browsing! -- PanchamBro (talkcontributions) 21:32, February 4, 2021 (EST)