macOS Calendar: Two March 15, 2025s. Sat and Sun

This is really bizarre but my MacOS Calendar app, in Month view, shows two March 15ths. Both Saturday and Sunday are March 15, and the rest of the month is offset to make up for the two March 15ths!

I’ve been hearing about Apple software being buggy lately, and this is the 2nd crazy bug I’ve personally run across in this release of macOS.

Week, Day and Year views work fine. Only the Month view does this.