Another fun thing is that some countries that celebrate Ramadan may change back to normal time during Ramadan. So you can 2-4 DLS changes per year depending on

Another fun thing is that some countries that celebrate Ramadan may change back to normal time during Ramadan. So you can 2-4 DLS changes per year depending on when Ramadan falls. Luckily most time systems don’t really care, but it’s still a fun edge case. You really can’t hard code anything.