In the northern hemisphere, summer begins at 6:26 AM MDT (12:26 UTC).
It’s the longest day of the year for locations north of the equator. The further north, the more daylight. That means 14 hours and 31 minutes of daylight in Albuquerque, 14 hours and 59 minutes in Denver, Colorado, 15 hours and 43 minutes in Billings, Montana, and 21 hours 48 minutes in Fairbanks, Alaska.
The United States Naval Observatory can tell you the duration of daylight today in your location (U.S. only).
