Date & Time
Age, duration & timezone calculators
How Many Days Until Summer?
Count down to the start of summer with a live timer. The calculator targets the summer solstice (around 21 June in the Northern Hemisphere) and shows the whole-day count to it, the exact date and weekday, and a weeks-and-days breakdown, on top of a second-by-second timer read from your device clock. The count is computed on UTC midnights so a day is always a full calendar day, and once the solstice passes the countdown rolls forward to next year. You can download an .ics reminder, and everything runs in your browser.
Summer = the solstice, around 21 June (Northern Hemisphere)
- Live countdown to the next summer solstice with its date and weekday
- Weeks-and-days breakdown + add-to-calendar (.ics)
Frequently asked questions
How many days until summer?
Summer starts at the solstice, around 21 June in the Northern Hemisphere. The calculator counts the whole days to the next solstice and shows a live days/hours/minutes/seconds timer, auto-rolling to next year once it passes.
Does summer start on the same date every year?
The astronomical start of summer — the solstice — is around 21 June each year in the Northern Hemisphere. The tool uses that convention; the Southern Hemisphere’s seasons are offset by six months.