Days Until Summer

A live countdown to the first day of Northern-Hemisphere summer — the June solstice, which falls on June 20 or 21 depending on the year. See the days remaining plus a running hours, minutes and seconds timer — free and running entirely in your browser.

– days until Summer  
 

Summer begins at the June solstice, which falls on 20 or 21 June in most years (Northern Hemisphere).

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How many days until summer?

This countdown targets the first day of summer in the Northern Hemisphere — the June solstice. The solstice is not on a fixed date: it falls on June 21 in most years and on June 20 in others, drifting because the tropical year is about 365.2422 days. This page uses the actual solstice date for each year rather than a fixed reference, so the count is right every year.

The big number shows the days remaining and the live timer counts down hours, minutes and seconds.

How the date is worked out

Astronomical summer in the Northern Hemisphere begins at the June solstice, the moment the Sun reaches its northernmost point. In UTC that moment lands on June 21 in 2026, 2027, 2029, 2030 and 2031, and on June 20 in 2028 and 2032 — and because the instant is a clock time, not just a date, it can fall on the earlier day in western time zones. Meteorological summer is defined differently — it starts on June 1 and runs through August — which is why you'll sometimes see both dates described as the 'start of summer'. In the Southern Hemisphere the seasons are reversed, and June marks the start of winter.

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Frequently Asked Questions

When does summer start?
Astronomical summer in the Northern Hemisphere starts at the June solstice, which falls on June 20 or June 21 depending on the year — June 21 in 2026 and 2027, June 20 in 2028. This countdown targets the real solstice date each year. Meteorological summer starts on June 1.
Is this the solstice exactly?
The summer countdown targets the calendar date of the June solstice, not the exact astronomical instant. That instant has a clock time as well as a date — 08:24 UTC on 21 June 2026, for example — so in some time zones it lands on the previous day. Treat the counter as reaching zero at local midnight on the solstice date.
Does this work for the Southern Hemisphere?
This page counts down to the Northern-Hemisphere start of summer. South of the equator the seasons are reversed, so the June solstice marks the start of winter and the shortest day of the year there. Southern-Hemisphere summer instead begins at the December solstice, on 21 or 22 December.
When does meteorological summer start, and how is that different?
Meteorological summer starts on June 1 and runs to August 31, grouping whole calendar months so that seasonal statistics can be compared cleanly from year to year. Astronomical summer instead begins at the June solstice on June 20 or 21 and ends at the September equinox around September 22. The two definitions differ by roughly three weeks, which is why forecasters and astronomers quote different start dates. This countdown targets the astronomical start, the solstice itself.