- Spring ahead, Fall back.
Explanation: A mnemonic for Daylight Saving Time (DST). This memory aid reminds us how to adjust the clock. In the fall (autumn), the clock will be set back an hour. In the spring, it will jump ahead one hour. William Willett, in the “Waste of Daylight,” published in 1907, first seriously proposed the concept of DST; but he was unable to get the British government to adopt it, despite considerable lobbying.