I’d pull a xkcd, we’d have 13 months every year because it’s a prime number, but the amount of days per month would be powers of two for the first 7 (also prime!) = 2, 4, 8, 16, 32, 64, 128; after that, apply some weird math with the current year in order to distribute the remaining 110 days among the 6 months but such that they all end with an odd number of days. Every month would have 2 weeks, made of half the month’s days + 1.
I’d pull a xkcd, we’d have 13 months every year because it’s a prime number, but the amount of days per month would be powers of two for the first 7 (also prime!) = 2, 4, 8, 16, 32, 64, 128; after that, apply some weird math with the current year in order to distribute the remaining 110 days among the 6 months but such that they all end with an odd number of days. Every month would have 2 weeks, made of half the month’s days + 1.