Daylight saving: local time and fixed JST and EST
The converter starts with Tokyo to New York, using local clock rules. For the standard-time offsets all year, use the fixed JST and EST 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 JST and EST |
|---|---|---|
| 2026-01-15 12:00 | 2026-01-14 22:00 (UTC-05:00) | 2026-01-14 22:00 |
| 2026-07-15 12:00 | 2026-07-14 23:00 (UTC-04:00) | 2026-07-14 22:00 |
12:00 PM Wednesday 15 Jul in Tokyo is 11:00 PM Tuesday 14 Jul in New York (EDT, 13 h behind).
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.