This (https://en.wikipedia.org/wiki/Daylight_saving_time) is daylight savings, basically when the clocks change either forwards or backwards an hour.
The aim of this game jam is to start making a game an hour before the clocks go back an hour, so you will make a game from 2:00am to 2:59am then the clocks go back and it is 2:00am again.
goodluck <3