Shortest Day of the Year 2024 in Iran

Saturday, 21 December 2024

The Winter Solstice occurs at 12:53

The days become shorter as a result of the earth tilting away from the sun (at least in one hemisphere at a time). This causes the sun to appear lower in the sky and spend less time above the horizon, meaning the day is shorter.

Solstice sunrise, sunset and day length in Tehran

Sunrise

sunrise 07:11 Direction: 119°
First light: 06:43

Sunset

sunset 16:55 Direction: 241°
Last light: 17:24

How long is the shortest day of the year?

The Winter Solsitice is both the shortest day of the year and also the longest night. The good news is that from this point on the days will begin to get longer until Midsummer's Night in about 6 months.

Daylight & night hours for the Winter Solstice

Day length for 2024-06-26
Night Twilight begins:
5:38
First light:
6:41
Sunrise:
7:10
Sunset:
16:54
Last light:
17:23
Twilight ends:
18:26
Night

Whilst there will be more daylight going forward the same cannot be said for the temperature. This is just the beginning of winter* and temperatures will continue to drop for well over a month. The phenomena is known as seasonal lag where, despite there being more energy from the sun, the latent temperature of the Earth makes the air temperature slow to respond.

*Beginning of Astronomical winter. Meteological winter begins December 1 / June 1 (depending on hemisphere).

Winter Solstice Dates

The shortest day can occur on December 20, 21, 22, or 23. However, as you can see below the 21st is by far the most common. A December solstice on the 23rd is once in a hundred years occurrence, and a December 20 solstice is even rarer.

Dates of shortest day of the year in Iran
Year Date Time (Solstice)
2020 21st December 13:36
2021 21st December 19:32
2022 22nd December 01:21
2023 22nd December 07:00
2024 21st December 12:53
2025 21st December 18:36
2026 22nd December 00:23
2027 22nd December 06:15
2028 21st December 11:53
2029 21st December 17:47
2030 21st December 23:43

The date of the equinoxes and solstices varies because a year in our calendar does not exactly match the length of the astronomical calendar.

The word solstice comes from Latin 'solstitium' meaning "the sun stands still". This is because the sun's path north or south stops before reversing direction.