After getting used to Obsidian, I also started using some plugins, amongst them the Zettelkasten Plugin.
I did opt to change the format though, setting it to YYYYMMDD - I’m fine with having date as a UID, no more detail needed in the name.
Then I started using everything and was astonished. Every time I clicked on the new Zettelkasten note, the date was wrong. Off by a few days, every time. Year and month were ok, but it did set the day to 26 on the 21st. I checked my system settings and checked for time and date settings in Obsidian, just to make sure it didn’t get false data. Couldn’t solve it.
Now, by chance, I just made two or three new notes and found out what happened: The prefixer does not actually set the date, but year, month and then a number, increasing by one for each new note. So the first note hat “27”, the next one “28” and so on - the “DD” part of the prefixer, well, it isn’t prefixed