This whole Daylight Savings Time begins tomorrow, or possibly ends tomorrow, I dunno. No one can keep it straight. No one can even explain why we do this. Mom frequently points out that it was Benjamin Franklin's idea and helped farmers, but that still doesn't really explain the rationale. The only thing that strikes me is that the clocks gfo forward one hour, so it's the shortest day of the year. People point to December 21, but March 9 is only going to be 23 hours long. By my reckoning, that makes it the shortest day of the year.
It also means that tomorrow at this time, it won't be. Think about it.