It’s that time of year when we start thinking we should know this, but we don’t! And that is why you have Librarians (and the Internet Tubes 🙂 Of course in an election year when everyone seems to want to CHANGE (yeah, yeah), make sure you get that TIME change date from a reliable source, e.g.:
NASA or those NIST people (but make sure you’re in the right year – yikes)
And then there is the Official time.
(But don’t forget the Pop Clock for even scarier information.)