What time does it get dark today

Notes

Legal Use of the Calculated Data

Please see Astronomical Data Used for Litigation if you are interested in using the data produced by this service for legal purposes.

Definitions

For more information on the terms used, see the Astronomical Almanac Glossary , or the Rise, Set, Transit, and Twilight Definitions, and the Phases of the Moon and Percent of the Moon Illuminated pages in the Astronomical Information Center.

Computing Data for Multiple Days

If you need rise, set, or twilight times for a series of dates for a specific location, use our

Lunar Information

The moon phase and fraction illuminated provided are computed for noon on the date requested, in the time zone requested.

Time Formats

All the output times will be on a 24-hour clock.

Time Zones

When using the "Need USA Location" button, the service will fill the Time Zone hours field and set the Time Zone direction button according to the current standard time zone of the US place entered.

The railroads introduced standardized time zones to the USA in 1883.

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what time is official sunset tomorrow