I'm kinda surprized that date libraries break with a simple leap year like 2020. I'd have more understanding if it happened with the year 2000(leap year) or 210

I'm kinda surprized that date libraries break with a simple leap year like 2020. I'd have more understanding if it happened with the year 2000(leap year) or 2100(not a leap year), but the basic "is year divisible by 4" check should be good enough until 2100.