Summer starts on Thu, June 21 and ends on Sun, September 22.
The First Day of Summer 2025 is on Saturday, June 21, 2025 (in 189 days).
⚑ Northern Hemisphere
What is Summer?
Summer, the season of warmth and growth, is a global season that bridges the spring and autumn. It blesses the Northern Hemisphere from June to September and the Southern Hemisphere from December to March. This shared experience begins on the summer solstice, a celestial event that starts on June 20 or 21 in the Northern Hemisphere and December 21 or 22 in the Southern Hemisphere.
| Year | Summer starts on | Summer ends on |
| Summer 2024 | Thursday, June 20, 2024 | Sunday, September 22, 2024 |
| Summer 2025 | Saturday, June 21, 2025 | Monday, September 22, 2025 |
| Summer 2026 | Sunday, June 21, 2026 | Wednesday, September 23, 2026 |
| Summer 2027 | Monday, June 21, 2027 | Thursday, September 23, 2027 |
| Summer 2028 | Tuesday, June 20, 2028 | Friday, September 22, 2028 |
| Summer 2029 | Thursday, June 21, 2029 | Saturday, September 22, 2029 |
| Summer 2030 | Friday, June 21, 2030 | Sunday, September 22, 2030 |
Year | Summer Solstice (Northern Hemisphere) | Summer Solstice (Southern Hemisphere) |
2024 | Thursday, June 20, at 8:51 P.M. | Saturday, December 21 |
2025 | Saturday, June 21, at 2:42 A.M. | Sunday, December 21 |
2026 | Sunday, June 21, at 8:25 A.M. | Monday, December 21 |
2027 | Monday, June 21, at 14:11 A.M. | Tuesday, December 22 |
The duration of summer varies depending on the hemisphere and the specific location. The average length of summer in the Northern Hemisphere is 93.6 days, while in the Southern Hemisphere it is 89.0 days.
What is the Meteorological Summer?
Meteorological summer refers to the period defined by meteorologists and climatologists as the three months of June, July, and August in the Northern Hemisphere. In the Southern Hemisphere, meteorological summer is marked by the following three months: December, January, and February.
This meaning is based on the average temperature and precipitation patterns in each hemisphere rather than the astronomical definition of summer, which is defined by the position of the Earth in its rotation around the sun.
According to the meteorological calendar, summer always begins on June 1 and finishes on August 31.
How to calculate the how many days until summer in Excel?
One way to calculate the number of days until summer is by using spreadsheet software such as Google Sheets or Microsoft Excel, by using:
a. the formula to find the number of days remaining from the current date or
b. the formula from a specific date listed in another cell.
Let's start with the first case.
From the Current Date:
To calculate the number of days remaining from the current day, you can use the following function in a cell:
=DATE(2025, 6, 21) - TODAY()
This formula will display the number of days remaining once you enter it into a cell and hit Enter.
From Any Date:
If you want to calculate the number of days remaining from a specific date listed in another cell, you can use the following function to display the number of days remaining from the date displayed in cell A1:
=DATE(2025, 6, 21) - A1
Using these formulas, you can easily calculate the number of days until summer and track the countdown on your spreadsheet.