> Sometimes you really just want to express that something is going to happen at a certain time, regardless of timezone. If I set my alarm for 7:45 am, I need i

> Sometimes you really just want to express that something is going to happen at a certain time, regardless of timezone. If I set my alarm for 7:45 am, I need it to ring when the clock says 7:45 am, wherever in the world I happen to be. One of my toughest engineering projects was a system that supports “every Thursday at 3pm” and the participants can be in different timezones with different DST rules. I learned more about time math and how humans think about this stuff than I ever cared to know.