Daylight saving: local time and fixed GMT and CET
The converter starts with London to Central Europe, using local clock rules. For the standard-time offsets all year, use the fixed GMT and CET button.
These examples use noon on the dates shown. A converted date can be the previous or following day.
| Starting date and time | Using local city rules | Using fixed GMT and CET |
|---|---|---|
| 2026-01-15 12:00 | 2026-01-15 13:00 (UTC+01:00) | 2026-01-15 13:00 |
| 2026-07-15 12:00 | 2026-07-15 13:00 (UTC+02:00) | 2026-07-15 13:00 |
12:00 PM Wednesday 15 Jul in London is 1:00 PM Wednesday 15 Jul in Berlin (CEST, 1 h ahead).
Why daylight saving conversions need a date explains skipped and repeated clock readings. The rules here come from the browser’s time zone data and can lag a government change.