This is exactly how people become paranoid and think the world is out to get them. I’d switch days on the calendar too.
[snip] Gregorian calendar, also called New Style calendar, solar dating system now in general use. It was proclaimed in 1582 by Pope Gregory XIII... By the Julian reckoning, the solar year comprised 365 1/4 days, and the intercalation of a “leap day” every four years was intended to maintain correspondence between the calendar and the seasons. A slight inaccuracy in the measurement (the solar year comprising more precisely 365 days, 5 hours, 48 minutes, 45.25 seconds) caused the calendar dates of the seasons to regress almost one day per century. Although this regression had amounted to 14 days by Pope Gregory’s time, he based his reform on restoration of the vernal equinox, then falling on March 11, to March 21, the date it occurred in 325 CE, which was the time of the First Council of Nicaea, and not the date of the equinox at the time of the birth of Christ, when it fell on March 25. The change was effected by advancing the calendar 10 days after October 4, 1582, the day following being reckoned as October 15. [/snip]
https://www.britannica.com/topic/Gregorian-calendar
(in most English speaking countries, the transition came in October 1752)
https://libguides.ctstatelibrary.org/hg/colonialresearch/calendar
I may have the wrong city but I think I remember reading about this in National Geographic when it happened. Lots of pictures of damaged art and high water marks. Back then it was just a bad flood now its climate change and we all are going to die. Gave up on Nat Geographic about 20 years ago when everything was global warming and a species a day was going extinct according to them.