@anahata@mastodon.social isn't date/time supposed to be a nightmare thanks to leap seconds and day light savings?
Even Windows has glitches. At work we used to control packages by time stamp (I KNO RITE?) and if restoring during DST when the package was made during standard time Windows would display the wrong modified time. I've never checked on Linux... never bothered trying to track file version by time stamp in any other setting.