First day of summer · June solstice
How many days until summer?
Checked October 8, 2026 · first publish
257 days
Mon, Jun 21, 2027
There are 257 days until the first day of summer (June solstice), Mon, Jun 21, 2027. That is 36 weeks and 5 days. Meteorological summer begins sooner, on June 1, and astronomical summer ends at the September equinox.
36 weeks and 5 days · 37 weekends · 257 sleeps · 174 business days
| US time zone | Local time | Local date |
|---|---|---|
| Eastern time | 10:11 a.m. EDT | Mon, Jun 21, 2027 |
| Central time | 9:11 a.m. CDT | Mon, Jun 21, 2027 |
| Mountain time | 8:11 a.m. MDT | Mon, Jun 21, 2027 |
| Arizona time | 7:11 a.m. MST | Mon, Jun 21, 2027 |
| Pacific time | 7:11 a.m. PDT | Mon, Jun 21, 2027 |
| Alaska time | 6:11 a.m. AKDT | Mon, Jun 21, 2027 |
| Hawaii time | 4:11 a.m. HST | Mon, Jun 21, 2027 |
Instant from the US Naval Observatory (UTC), converted to local clock time.
| Year | UTC | New York time | Days away |
|---|---|---|---|
| 2026 | Sun, Jun 21, 2026, 08:24 UTC | 4:24 a.m. EDT on Sun, Jun 21, 2026 | 108 days ago |
| 2027 | Mon, Jun 21, 2027, 14:11 UTC | 10:11 a.m. EDT on Mon, Jun 21, 2027 | 257 |
| 2028 | Tue, Jun 20, 2028, 20:02 UTC | 4:02 p.m. EDT on Tue, Jun 20, 2028 | 622 |
| 2029 | Thu, Jun 21, 2029, 01:48 UTC | 9:48 p.m. EDT on Wed, Jun 20, 2029 | 987 |
| 2030 | Fri, Jun 21, 2030, 07:31 UTC | 3:31 a.m. EDT on Fri, Jun 21, 2030 | 1353 |
In 2029 the solstice comes at 01:48 UTC on June 21, which is the evening of Wed, Jun 20 across the United States.
How long is the longest day of the year?
| City | Sunrise | Sunset | Daylight |
|---|---|---|---|
| New York, NY | 5:25 a.m. | 8:31 p.m. | 15 h 6 min |
| Los Angeles, CA | 5:42 a.m. | 8:08 p.m. | 14 h 26 min |
| Chicago, IL | 5:15 a.m. | 8:29 p.m. | 15 h 14 min |
| Houston, TX | 6:22 a.m. | 8:25 p.m. | 14 h 3 min |
| Phoenix, AZ | 5:19 a.m. | 7:41 p.m. | 14 h 22 min |
| Philadelphia, PA | 5:32 a.m. | 8:33 p.m. | 15 h 1 min |
| San Antonio, TX | 6:35 a.m. | 8:37 p.m. | 14 h 2 min |
| San Diego, CA | 5:41 a.m. | 8:00 p.m. | 14 h 19 min |
| Dallas, TX | 6:20 a.m. | 8:38 p.m. | 14 h 18 min |
| Seattle, WA | 5:12 a.m. | 9:11 p.m. | 15 h 59 min |
| Denver, CO | 5:32 a.m. | 8:31 p.m. | 14 h 59 min |
| Miami, FL | 6:30 a.m. | 8:15 p.m. | 13 h 45 min |
Calculated by DayReckon with the NOAA solar equations.
How much longer is the longest day in the north?
The June solstice spreads the 12 cities further apart than any other day. On Mon, Jun 21, 2027, Seattle gets close to 16 hours between sunrise and sunset, by our calculation. Chicago gets about 15 hours 14 minutes, New York about 15 hours 6 minutes, and Los Angeles about 14 hours 26 minutes. Miami, the southernmost city in the table, gets about 13 hours 45 minutes. That is more than two hours of difference on the same date.
Compare that with the March equinox, when all 12 cities sit within a few minutes of 12 hours. The further north you live, the larger your swing between June and December.
Is summer on June 1 or June 21?
It depends on the calendar. Weather services group the year into whole months, so meteorological summer is June, July and August. NOAA uses that version because whole months make season statistics easier to compare year to year. The astronomical calendar uses the solstice instead. Our counter runs to the solstice, and the weeks line gives a quick sense of how far June 1 is.
Does the first day of summer change date?
Yes, between June 20 and June 21 in US time. In 2028 the solstice comes at 20:02 UTC on Tue, Jun 20. In 2029 it is at 01:48 UTC on June 21, which is still Wednesday evening, June 20, everywhere in the United States.
Questions people ask
- When is the first day of summer 2027?
- The June solstice is Mon, Jun 21, 2027 at 14:11 UTC. That is 10:11 a.m. in New York, 7:11 a.m. in Los Angeles and 4:11 a.m. in Honolulu. The time comes from the US Naval Observatory and matches AstroPixels to the minute.
- How many weeks until summer?
- It is 36 weeks and 5 days until the solstice, Mon, Jun 21, 2027. If you mean the end of school instead, the last-day-of-school page lists 2027 dates for nine school districts, most of which finish in late May or early June.
- When does summer end?
- Astronomical summer ends at the September equinox. In 2027 that is 06:02 UTC on Sep 23: 2:02 a.m. on Thu, Sep 23 in New York, but still 11:02 p.m. on Wed, Sep 22 in Los Angeles. Meteorological summer ends on August 31.
- Which US city has the longest day?
- Of the 12 cities we track, Seattle has the longest day: about 15 hours 59 minutes of daylight on Mon, Jun 21, 2027. Miami has the shortest, about 13 hours 45 minutes. Chicago gets about 15 hours 14 minutes.
Sources
- US Naval Observatory: Earth's Seasons (API) — aa.usno.navy.mil
- AstroPixels: Solstices and Equinoxes 2001-2100 — astropixels.com
- NOAA NCEI: Meteorological versus astronomical seasons — ncei.noaa.gov
- City coordinates: Wikipedia (MediaWiki API) — en.wikipedia.org
General date information from official calendars (OPM, USNO). It is not legal, tax or immigration advice; check the agency named on the page for your own deadline.