The 4-6-8-... and 9-5-7-11 rules are really nice to have on hand. The rest of relating years; 99% of the time I'm going to be calculating dates for the current

The 4-6-8-... and 9-5-7-11 rules are really nice to have on hand. The rest of relating years; 99% of the time I'm going to be calculating dates for the current year so those seem less useful to me (not to mention that part is a lot more complicated to remember)