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Days
How Many Days Until Summer?
The live countdown to the first day of summer — days, weeks, hours, minutes and seconds until the June solstice.
The first day of summer 2027 falls on Monday, June 21, 2027 — the June solstice, the longest day of the year in the Northern Hemisphere. The live timer on this page shows the exact time remaining: there are … days until summer, counting down every second.
☀️ Summer is here! The first day of summer is today — Monday, June 21, 2027.
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Day count above is calendar days. The live timer counts the exact time left, so its day figure can read one less.
| Days until summer | … |
| Weeks and days | … |
| Hours until summer | … |
| Minutes until summer | … |
| Seconds until summer | … |
| Days until June 1 (meteorological summer) | … |
| First day of summer is day | … |
| Share of the year still to wait | … |
How This Summer Countdown Is Counted
The big number at the top is a count of calendar days. It takes today's date, counts forward to the first day of summer — the June solstice — and calls the difference the days until summer, the same way you would count squares on a wall calendar. Underneath, the live clock shows the exact time remaining until that day begins, split into days, hours, minutes and seconds, and recalculated every second from your device's clock.
Unlike fixed-date countdowns such as Christmas, this target moves. The solstice is an astronomical moment: it arrives about 6 hours later each year, because the year is roughly 365¼ days long, and the leap day every four years pulls the calendar back into line. So the first day of summer lands on June 21 in some years and June 20 in others — this page carries the published solstice dates (2027: June 21; 2028 and 2029: June 20; 2030: June 21) and always aims at the next one, this year's if it is still ahead, next year's if it has passed.
Worked Example: The Same Counter, Checked on Three Different Days
On 1 January 2027, with the year brand new, this counter reads 171 days until summer — nearly half a year, easy to ignore. Check again on 20 March 2027, the first day of spring, and it reads 93 days: spring's whole run, almost exactly. Check a third time on 1 June 2027 and the number is 20 — close enough that the wait has become a plan: three weekends, then the longest day of the year. The counter did not change its mind between visits; the dates are fixed by astronomy, and it just kept counting, which is rather the point of it.
First Day of Summer in the Coming Years
| Year | First day of summer | Day of the week |
|---|---|---|
| 2027 | June 21, 2027 | Monday |
| 2028 | June 20, 2028 | Tuesday |
| 2029 | June 20, 2029 | Wednesday |
| 2030 | June 21, 2030 | Friday |
The slide from June 21 to June 20 and back is the leap day at work: February 29, 2028 shoves the solstice's calendar date one day earlier for two years, until the accumulated drift pushes it back to June 21 in 2030.
Two Starts to Summer
Summer has two official beginnings. Astronomical summer starts at the June solstice — in 2027, at 10:10 a.m. EDT on June 21 — and ends at the September equinox. Meteorological summer is simpler: June 1 to August 31, fixed whole months that weather services use so records from different years line up. Neither is wrong; they just answer different questions. This countdown targets the astronomical start, the one printed on calendars, and shows the days until June 1 in the table above for anyone planning by the forecasters' version. One more turn of the globe: in the Southern Hemisphere the seasons are flipped, and this same June solstice is the first day of winter — their summer starts at the December solstice.
Making the Wait Useful
The first day of summer is also the longest day — after it, daylight quietly starts shrinking again, which makes the solstice a natural deadline: trips booked, gardens planted, and summer projects started before the light peaks get the most of it. Counting to a date earlier in the year instead? The countdown before this one in the calendar is the Easter countdown.
Frequently Asked Questions
How many days until summer?
The first day of summer 2027 falls on Monday, June 21, 2027 — the June solstice. The live counter at the top of this page recounts the days, hours, minutes and seconds every second, so it always shows today's exact figure.
How many weeks until summer?
To work it out on any day, divide the days until summer from the live counter above by 7 — that gives the full weeks, and the counter shows the weeks and leftover days side by side.
What date is the first day of summer 2027?
The first day of summer 2027 is Monday, June 21, 2027. That is the day of the June solstice — the solstice moment itself is at 10:10 a.m. EDT — when the Sun reaches its northernmost point and the Northern Hemisphere gets its longest day of the year. In 2028 the solstice falls a day earlier, on Tuesday, June 20.
Why does the first day of summer fall on different dates?
Summer starts at an astronomical moment, not a calendar date: the June solstice happens when Earth's axis tilts most toward the Sun, and that moment arrives about 6 hours later each year because a year is roughly 365¼ days long. Every four years the leap day pulls it back, so in this era the solstice — and the first day of summer — lands on June 20 or June 21: June 21 in 2027, June 20 in 2028 and 2029, and June 21 again in 2030.
Is June 1 the first day of summer?
It depends who you ask. Weather forecasters use meteorological summer — June 1 to August 31 — because whole months are easier for comparing weather records. Calendars and astronomers use the solstice. This page counts down to the astronomical first day of summer (the June solstice), and the table at the top also shows the days until June 1 so you can follow either start.
Does this countdown work after summer starts?
Yes. On the solstice day itself the page celebrates the first day of summer, and once it has passed the counter rolls over and starts counting down to the next June solstice — so during summer it is already counting toward next year's first day.