Season
How Many Days Until Summer 2027?
Today: · Eastern Time (America/New_York)
Calendar days until Summer
240 days until Summer
First Day of Summer is on Monday, June 21, 2027.
Live countdown to midnight on June 21, 2027
239 days, 17 hours, 24 minutes, 51 seconds remaining
Eastern Time (America/New_York). Countdown days are 24 hours; the calendar-day count above uses local dates.
- Calendar days (signed)
- 240
- Full weeks + days
- 34 weeks + 2 days
- Calendar months + days
- 7 months + 28 days
- Years, months, days
- 0 years, 7 months, 28 days
- Weekdays counted
- 171
- Weekend days counted
- 69
- U.S. business days
- 163
- Observed holiday dates skipped
- 8
What is the first day of summer?
The first day of summer in the Northern Hemisphere is the June solstice, the day with the most hours of daylight. After it, days slowly get shorter. In the Southern Hemisphere it is the shortest day and the start of winter.
History of the first day of summer
Ancient monuments such as Stonehenge in England are aligned with the solstice sunrise, and Midsummer festivals have been celebrated in Europe for centuries, especially in Scandinavia.
The first day of summer today
Thousands gather at Stonehenge to watch the sunrise, Scandinavians celebrate Midsummer with maypoles and outdoor meals, and many places hold music festivals, such as the Fête de la Musique in France on June 21. Meteorological summer begins June 1.
Date details
- Category
- Season
- How the date is set
- Set by a yearly rule
- Country / region
- United States
- Actual event date
The June solstice marks the start of astronomical summer in the Northern Hemisphere. Dates use Eastern Time; the moment can fall on the previous or next calendar day elsewhere. It is the longest day of the year in the Northern Hemisphere. Meteorological summer begins June 1.
Source: U.S. Naval Observatory
Event date facts
- Weekday
- Monday
- ISO week / year
- 25 / 2027
- Day of year
- 172
- Quarter
- 2
- Days left in year
- 193
- Leap year
- No
June 2027
| Mon | Tue | Wed | Thu | Fri | Sat | Sun |
|---|---|---|---|---|---|---|
| Target | ||||||
Event dates by year
| Rule year | Actual date | Observed federal closure | Certainty |
|---|---|---|---|
| 2025 | No date available | — | Date awaiting announcement |
| 2026 | Sunday, June 21, 2026 | — | Set by a yearly rule |
| 2027 | Monday, June 21, 2027 | — | Set by a yearly rule |
| 2028 | Tuesday, June 20, 2028 | — | Set by a yearly rule |
| 2029 | Wednesday, June 20, 2029 | — | Set by a yearly rule |
Quick answers
- What day of the week is June 21, 2027?
- June 21, 2027 is a Monday.
- Is Summer a federal holiday?
- No. First Day of Summer is not a U.S. federal holiday, so federal offices and most businesses stay open.
- What week of the year is June 21, 2027?
- June 21, 2027 is in ISO week 25 of 2027 and is day 172 of the year.
How the Summer date is calculated
- The first day of summer is the date of the June solstice, when the Sun reaches its northernmost point in the sky (Northern Hemisphere). The moment comes about six hours later each year and jumps back after each leap day, so the date can move by a day.
- In 2027 it falls on Monday, June 21, 2027 in Eastern Time, from U.S. Naval Observatory data.
- The countdown counts calendar days from today to June 21, 2027. The start date is excluded and the end date is included. Dates use Eastern Time (America/New_York).
- The live countdown runs to midnight at the start of June 21, 2027 in Eastern Time (America/New_York). A countdown day is 24 hours, so a daylight-saving change can make it differ from the calendar-day count by an hour.
- Calculated at 6:35 AM on October 24, 2026.
- U.S. business days exclude Saturday, Sunday and observed nationwide federal closures; individual employer and state schedules are not included.