Americans got an extra hour of sleep last night.
Fun fact: did you know that the length of an hour originally wasn't a static duration of time? Instead it was defined by sundials and changed with the seasons. The first mechanical clocks were considered very inaccurate because every hour was 60 minutes exactly. Lots of clocks even had mechanisms to keep them accurate to sundials. It wasn't until later on that the hour was redefined to be what we consider it today.
Fun fact: did you know that the length of an hour originally wasn't a static duration of time? Instead it was defined by sundials and changed with the seasons. The first mechanical clocks were considered very inaccurate because every hour was 60 minutes exactly. Lots of clocks even had mechanisms to keep them accurate to sundials. It wasn't until later on that the hour was redefined to be what we consider it today.