Sunrise and Sunset times in Keystone, United States 
Today:
 Sunrise: 07:27:59
|
 Sunset: 16:27:45
|
Day Length: 8h 59m 46s
Time zone: America/Denver, UTC -7 h.
Latitude: 43.8955, Longitude: -103.427
Keystone
South Dakota, United States 
339 people
| Date | Sunrise | Solar Noon | Sunset | Day length |
|---|---|---|---|---|
| 2026-Jan-01, Thursday | 07:27:58 | 11:57:24 | 16:26:51 | 8h 58m 53s |
| 2026-Jan-02, Friday | 07:27:59 | 11:57:52 | 16:27:45 | 8h 59m 46s |
| 2026-Jan-03, Saturday | 07:27:58 | 11:58:20 | 16:28:41 | 9h 0m 43s |
| 2026-Jan-04, Sunday | 07:27:55 | 11:58:47 | 16:29:39 | 9h 1m 44s |
| 2026-Jan-05, Monday | 07:27:48 | 11:59:14 | 16:30:39 | 9h 2m 51s |
| 2026-Jan-06, Tuesday | 07:27:40 | 11:59:40 | 16:31:40 | 9h 4m 0s |
| 2026-Jan-07, Wednesday | 07:27:29 | 12:00:06 | 16:32:43 | 9h 5m 14s |
| 2026-Jan-08, Thursday | 07:27:15 | 12:00:31 | 16:33:47 | 9h 6m 32s |
| 2026-Jan-09, Friday | 07:26:59 | 12:00:56 | 16:34:53 | 9h 7m 54s |
| 2026-Jan-10, Saturday | 07:26:40 | 12:01:20 | 16:36:00 | 9h 9m 20s |
| 2026-Jan-11, Sunday | 07:26:19 | 12:01:44 | 16:37:08 | 9h 10m 49s |
| 2026-Jan-12, Monday | 07:25:56 | 12:02:07 | 16:38:18 | 9h 12m 22s |
| 2026-Jan-13, Tuesday | 07:25:30 | 12:02:29 | 16:39:29 | 9h 13m 59s |
| 2026-Jan-14, Wednesday | 07:25:02 | 12:02:51 | 16:40:41 | 9h 15m 39s |
| 2026-Jan-15, Thursday | 07:24:31 | 12:03:12 | 16:41:54 | 9h 17m 23s |
| 2026-Jan-16, Friday | 07:23:58 | 12:03:33 | 16:43:08 | 9h 19m 10s |
| 2026-Jan-17, Saturday | 07:23:23 | 12:03:53 | 16:44:22 | 9h 20m 59s |
| 2026-Jan-18, Sunday | 07:22:45 | 12:04:12 | 16:45:38 | 9h 22m 53s |
| 2026-Jan-19, Monday | 07:22:05 | 12:04:30 | 16:46:55 | 9h 24m 50s |
| 2026-Jan-20, Tuesday | 07:21:23 | 12:04:48 | 16:48:12 | 9h 26m 49s |
| 2026-Jan-21, Wednesday | 07:20:39 | 12:05:04 | 16:49:30 | 9h 28m 51s |
| 2026-Jan-22, Thursday | 07:19:52 | 12:05:21 | 16:50:49 | 9h 30m 57s |
| 2026-Jan-23, Friday | 07:19:04 | 12:05:36 | 16:52:08 | 9h 33m 4s |
| 2026-Jan-24, Saturday | 07:18:13 | 12:05:50 | 16:53:28 | 9h 35m 15s |
| 2026-Jan-25, Sunday | 07:17:20 | 12:06:04 | 16:54:48 | 9h 37m 28s |
| 2026-Jan-26, Monday | 07:16:25 | 12:06:17 | 16:56:09 | 9h 39m 44s |
| 2026-Jan-27, Tuesday | 07:15:28 | 12:06:29 | 16:57:30 | 9h 42m 2s |
| 2026-Jan-28, Wednesday | 07:14:29 | 12:06:40 | 16:58:51 | 9h 44m 22s |
| 2026-Jan-29, Thursday | 07:13:28 | 12:06:51 | 17:00:13 | 9h 46m 45s |
| 2026-Jan-30, Friday | 07:12:26 | 12:07:01 | 17:01:35 | 9h 49m 9s |
| 2026-Jan-31, Saturday | 07:11:21 | 12:07:09 | 17:02:58 | 9h 51m 37s |
Day length in Keystone during the year on the chart:
Keystone on United States map:
Locations in the same time zone America/Denver
Denver (Colorado), Salt Lake City (Utah), El Paso (Texas), Albuquerque (New Mexico), Colorado Springs (Colorado), Ogden (Utah), Provo (Utah), Aurora (Colorado), Fort Collins (Colorado), Lakewood (Colorado), Pueblo (Colorado), Thornton (Colorado), Grand Junction (Colorado), West Valley City (Utah), Las Cruces (New Mexico), Greeley (Colorado), Boulder (Colorado), Billings (Montana), Arvada (Colorado), St. George (Utah), West Jordan (Utah), Westminster (Colorado), Centennial (Colorado), Santa Fe (New Mexico), Highlands Ranch (Colorado), Logan (Utah), Longmont (Colorado), Orem (Utah), Rio Rancho (New Mexico), Sandy (Utah)
Largest populated areas in United States
New York (New York), Los Angeles (California), Chicago (Illinois), Miami (Florida), Dallas (Texas), Philadelphia (Pennsylvania), Houston (Texas), Washington (District of Columbia), Atlanta (Georgia), Boston (Massachusetts), Phoenix (Arizona), Seattle (Washington), San Francisco (California), Detroit (Michigan), San Diego (California), Minneapolis (Minnesota), Tampa (Florida), Denver (Colorado), Brooklyn (New York), Queens (New York), Baltimore (Maryland), Riverside (California), St. Louis (Missouri), Las Vegas (Nevada), Portland (Oregon), San Antonio (Texas), Sacramento (California), San Jose (California), Orlando (Florida), Cleveland (Ohio)
Countries closest to United States
*Calculation of distances from capital to capital
Daylight Hours FAQ: 10 Most Googled Questions Answered
Daylight hours refer to the period between sunrise and sunset. This duration changes throughout the year based on season and geographic location.
Earth's 23.5° axial tilt causes uneven sunlight distribution. Your hemisphere receives less direct sunlight in winter (shorter days) and more in summer (longer days).
Northern Hemisphere: June 20-22 (summer solstice).
Southern Hemisphere: December 21-23.
Near polar circles, the sun doesn't set for 24 hours.
Northern Hemisphere: December 21-22 (winter solstice).
Southern Hemisphere: June 20-21.
The closer to poles, the more extreme variations:
- Equator: ~12-hour days year-round
- Polar regions: Midnight sun/polar nights occur
Miami's lower latitude means:
- Winter days are longer than NY's
- Summer days are slightly shorter
During equinoxes:
- Spring: March 20-21
- Fall: September 22-23
Most rapid change near equinoxes: 2-4 minutes daily.
Slowest change near solstices: <1 minute daily.
Reliable tools:
- Timeanddate.com
- SunCalc.org
- Photographer's Ephemeris app
Yes. Reduced winter sunlight may cause:
- Seasonal Affective Disorder (SAD)
- Vitamin D deficiency
Solution: Light therapy lamps & midday walks