Current rules
- Sunrise
- 6:50 AM
- Solar noon
- 12:46 PM
- Sunset
- 6:41 PM
- Civil dawn
- 6:23 AM
- Civil dusk
- 7:08 PM
- Daylight
- 11h 50m 42s
Daylight duration unchanged
Clock policy
What would permanent daylight or standard time look like here?
See how clock rules shift sunrise and sunset. The amount of daylight stays the same—only its position on the clock changes.
Location
New York
New York, United States
40.7128°, -74.0060° · America/New_York
Clock policy changes the displayed time of daylight, not how much daylight occurs.
Explore a common scenarioOptional
Examples select a date or view that highlights how clock policy affects mornings and evenings.
Permanent standard time
- Sunrise
- 5:50 AM
- Solar noon
- 11:46 AM
- Sunset
- 5:41 PM
- Civil dawn
- 5:23 AM
- Civil dusk
- 6:08 PM
- Daylight
- 11h 50m 42s
Daylight duration unchanged
Permanent daylight time
- Sunrise
- 6:50 AM
- Solar noon
- 12:46 PM
- Sunset
- 6:41 PM
- Civil dawn
- 6:23 AM
- Civil dusk
- 7:08 PM
- Daylight
- 11h 50m 42s
Daylight duration unchanged
Threshold analysis
| Policy | Latest winter sunrise | Earliest winter sunset | Days sunrise after | Days sunset before |
|---|---|---|---|---|
| Current rules | 7:20 AM | 4:28 PM | 0 | 81 |
| Permanent standard time | 7:20 AM | 4:28 PM | 0 | 87 |
| Permanent daylight time | 8:20 AM | 5:28 PM | 68 | 0 |
- Under current rules, sunrise would occur after 08:00 on 0 days.
- Under permanent standard time, sunrise would occur after 08:00 on 0 days.
- Under permanent daylight time, sunrise would occur after 08:00 on 68 days.
- Permanent daylight time would add evening clock light but remove morning clock light where a seasonal change applies — total daylight is unchanged.
My schedule
Methodology: solar events are calculated from latitude, longitude, and date. Clock policy only remaps those instants onto civil clock labels. Permanent policies are hypothetical. Timezone laws can change. This tool does not endorse any clock policy.
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