DayReckon

How many days until the first day of summer?

Astronomical summer in the Northern Hemisphere starts at the June solstice, the longest day of the year. Here is the countdown to that day, with the exact time for each year.

The first day of summer is on Monday, June 21, 2027.

Astronomical summer in the Northern Hemisphere begins at the June solstice, on June 20, 21 or 22 depending on the year and your time zone.

The first day of summer dates for the coming years

EventDate (US Eastern)WeekdayExact moment
June solstice 2027June 21, 2027MondayJune 21, 2027, 14:11 UTC
June solstice 2028June 20, 2028TuesdayJune 20, 2028, 20:02 UTC
June solstice 2029June 20, 2029WednesdayJune 21, 2029, 01:48 UTC
June solstice 2030June 21, 2030FridayJune 21, 2030, 07:31 UTC
June solstice 2031June 21, 2031SaturdayJune 21, 2031, 13:17 UTC
June solstice 2032June 20, 2032SundayJune 20, 2032, 19:09 UTC
June solstice 2033June 20, 2033MondayJune 21, 2033, 01:01 UTC

The longest day of the year

At the June solstice the North Pole is tilted closest to the Sun, which follows its highest path across the sky. North of the Arctic Circle the Sun does not set at all. In New York the day is about 15 hours long; in London, about 16 and a half.

The exact moment is the same everywhere, but its calendar date depends on your time zone, so it can be June 20, 21 or 22. The dates in the table are for US Eastern time, and the “Exact moment” column gives the time in UTC.

Astronomical and meteorological summer

Meteorological summer is June, July and August, so weather services count it from June 1. Many people think of summer as starting with the end of the school year or, in the US, with Memorial Day weekend. In the Southern Hemisphere the June solstice is the first day of winter.

Questions people ask

Is the first day of summer the longest day?

Yes. In the Northern Hemisphere, the day of the June solstice has the most daylight of the year.

If it is the longest day, why is it not the hottest?

Land and oceans take weeks to warm up, so the hottest weeks usually come in July and August, well after the solstice.

When does summer end?

At the September equinox, around September 22. See the countdown to fall.

Reviewed October 24, 2026. Spotted a mistake? Tell us.