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.)