with the year being 365.24219 days you don’t get a lot of factors to work with (365 ⇒ 1, 5, 73, 365)
there have been various proposals for perennial calendars – in a perennial calendar, months always start on the same day, have the same number of days, no worries about “last Thursday of the month” calculations for holidays
if you deal with the year as 364 days + filler, you get more factors to work with (364 ⇒ 1, 2, 4, 7, 13, 14, 26, 28, 52, 91, 182, 364)
fiscal quarters are always the same length and you get an extra day during the winter holidays
the easiest being something like a 13 month calendar (each month being exactly 4 weeks, 28 days) = 364 days + 1 year day + 1 leap day – this gets a lot of flack from religious groups because they don’t like the extra days messing with a 7 day week cycle
this keeps the 365 day year and uses the same calculations for adding in leap days
leap week calendars get around that by doing a 364 day year and then adding in a whole leap week to bring things back into alignment (you can do this yourself using ISO week dates and looking for week 53)
calculations for leap years are a bit more elaborate and don’t fit as easily into a simple mnemonic
(Chris Titus Tech getting blowback last year marking a whole group of distros as “Pointless” when they did nothing more than a reskin or pre-install a couple in-repo packages)
after a 14 hour plane ride, the existential threat of transporters seems a lot less important …