Science ❯ Physics

Time Measurement

Atomic Clocks Chronometry Daylight Saving Time Chronobiology Chronology Equation of Time Leap Seconds Standards Gravitational Time Dilation Standards Organizations

Germany Sets Clocks Forward to Summer Time on March 29, 2026

An EU rule fixing the shift to the last Sunday in March makes this year’s change occur a day earlier than in 2025.

Germany Switches to Summer Time Overnight March 28–29, 2026

NIST Restores U.S. Time After Colorado Outage Causes Microsecond Drift

Winter Solstice Arrives Sunday at 3:03 p.m. GMT, Marking Year’s Shortest Day

Germany Returns to Winter Time After Smooth Overnight Clock Change

EU Clock-Change Overhaul Still Stalled as Europe Prepares to Switch Back on Oct. 26

EU Clock-Change Overhaul Stalled Again as October Switch Goes Ahead

Clock Change Dates Set: Spain Falls Back Oct. 26, U.S. on Nov. 2

Record-Short Days Renew Debate Over First-Ever Negative Leap Second

Earth Sets Second-Shortest Day of 2025 as Spin Continues to Accelerate

Earth Logs 1.34-Millisecond Day, Its Second-Shortest on Record

Scientists Confirm August 5 as Shortest Day of 2025, Eye Negative Leap Second

New Projections Confirm Record-Short Days This July and August

July 9 Recorded Among Shortest Days as Earth’s Spin Continues to Accelerate

Earth's Spin Breaks Short-Day Records as Timekeepers Halt 2025 Leap Second

Three Record-Short Days Ahead as Earth’s Spin Accelerates

EU Clocks Spring Forward as Daylight Saving Time Continues Despite Calls for Reform

Daylight Saving Time Ends: Clocks Set to Fall Back

Global Warming May Delay Introduction of First-Ever Negative Leap Second