Daylight Saving Time (DST) is a system where clocks are moved forward in warmer months to extend evening daylight, then set back again in colder months to return to standard time.

Quick answer: when was DST?

If by “when was DST” you mean for 2026 in the United States : DST started on Sunday, March 8, 2026, at 2:00 a.m. local time , when clocks moved forward to 3:00 a.m.

It will end on Sunday, November 1, 2026, at 2:00 a.m. local time , when clocks are set back to 1:00 a.m.

Key DST facts (2026, U.S.)

  • Starts: March 8, 2026, at 2:00 a.m., clocks go forward 1 hour.
  • Ends: November 1, 2026, at 2:00 a.m., clocks go back 1 hour.
  • Rule: In most of the U.S., DST runs from the second Sunday in March to the first Sunday in November under current federal rules.
  • Effect: You lose an hour of sleep in March but gain lighter evenings, and you gain an hour of sleep in November but get earlier sunsets.

Short background: when was DST “first”?

If your question is more historical—“when was DST invented/first used?”—modern DST was proposed in the late 19th–early 20th century and was first widely implemented during World War I as an energy‑saving measure in several countries.

In North America, one early adoption was in 1914 in Regina, Canada , with broader use spreading during WWI and later standardized in various national laws.

Simple table of 2026 DST dates (U.S.)

Event Date (2026) Local time change
DST starts Sunday, March 8 2:00 a.m. → 3:00 a.m. (lose 1 hour)
DST ends Sunday, November 1 2:00 a.m. → 1:00 a.m. (gain 1 hour)
If you meant DST for a different **country** or a different **year** , tell me which, and I can give the exact dates for that case.

Information gathered from public forums or data available on the internet and portrayed here.