How Many Days Until Summer 2027?
Summer 2027 is on Monday, June 21, 2027. The countdown below runs live from your device's clock and rolls over to 2028 once the day has passed. From today that is 238 days, or 34 weeks.
Live countdown to midnight at the start of the day, using your device's clock and time zone.
How many weeks until Summer?
There are 34 weeks until Summer 2027, counting from Monday, October 26, 2026. As a decimal that is 34 weeks (238 days ÷ 7). The count of full weeks drops by one every Tuesday, because Summer 2027 falls on a Monday.
When is Summer? Dates for 2027–2031
| Year | Date | Day of the week |
|---|---|---|
| 2027 | June 21, 2027 | Monday |
| 2028 | June 20, 2028 | Tuesday |
| 2029 | June 20, 2029 | Wednesday |
| 2030 | June 21, 2030 | Friday |
| 2031 | June 21, 2031 (approx.) | Saturday |
Rule: June solstice, usually June 20–21 in the US. Years marked approx. use the usual calendar date; the exact equinox or solstice can be a day earlier or later.
How the date of Summer is set
Astronomical summer starts at the June solstice, the longest day of the year in the Northern Hemisphere. The countdown runs to the exact moment published by the U.S. Naval Observatory; dates are shown in US Eastern Time. Meteorological summer starts June 1, and many people count school's last day instead. Source: U.S. Naval Observatory — Earth's Seasons (via National Weather Service).
How the countdown is counted
The big number counts calendar days from today, not counting today, so the day before Summer shows 1 day. The live clock counts down to the exact astronomical moment in your time zone, which is why it can show one day fewer plus some hours. As of Monday, October 26, 2026, 238 days remain, of which 170 are weekdays (Monday to Friday, public holidays not removed). To count down to a birthday, a trip or any other date, or to count the days since a past date, use the Days Until Calculator.
Other holiday countdowns
- Days until Christmas (December 25, 2026)
- Days until New Year's (January 1, 2027)
- Days until Valentine's Day (February 14, 2027)
- Days until St. Patrick's Day (March 17, 2027)
- Days until Easter (March 28, 2027)
- Days until Mother's Day (May 9, 2027)
- Days until Memorial Day (May 31, 2027)
- Days until Father's Day (June 20, 2027)
- Days until Fourth of July (July 4, 2027)
- Days until Labor Day (September 6, 2027)
- Days until Halloween (October 31, 2026)
- Days until Thanksgiving (November 26, 2026)
- Days until Black Friday (November 27, 2026)
- Days until Spring (March 20, 2027)
- Days until Fall (September 23, 2027)
- Days until Winter (December 21, 2026)
Frequently asked questions
How many days until Summer 2027?
Summer 2027 is on Monday, June 21, 2027. Counting from Monday, October 26, 2026, that is 238 days (34 weeks and 0 days). The countdown above updates live from your own clock.
What day of the week is Summer 2027?
Monday. Summer 2028 falls on a Tuesday (Tuesday, June 20, 2028).
How many weeks until Summer?
34 weeks (34 weeks) as of Monday, October 26, 2026. Summer 2027 is on Monday, June 21, 2027.
How is the date of Summer set?
June solstice, usually June 20–21 in the US. Astronomical summer starts at the June solstice, the longest day of the year in the Northern Hemisphere. The countdown runs to the exact moment published by the U.S. Naval Observatory; dates are shown in US Eastern Time. Meteorological summer starts June 1, and many people count school's last day instead.