Spring forward (start of DST) occurs on the last Sunday in March in many European countries, including Germany and the UK, and on the second Sunday in March in the United States. The exact dates for 2025 are:

• Europe (Germany, UK, most of continental Europe): DST begins on Sunday, March 30, 2025, when clocks are moved forward from 2:00 am to 3:00 am local time.
• United States (most states): DST begins on Sunday, March 9, 2025, when clocks are moved forward from 2:00 am to 3:00 am local time.
• DST ends (fall back) on the last Sunday in October in Europe and the first Sunday in November in the United States:
  • Europe: Sunday, October 26, 2025, clocks moved back from 3:00 am to 2:00 am.
  • United States: Sunday, November 2, 2025, clocks moved back from 2:00 am to 1:00 am.

If you’re asking about a different region or a specific year, tell me which location and year you need, and I’ll provide the exact date.