Length of Days in Mariehamn
We show daylight length in Mariehamn during 2025 and the equinoxes and solstices. From June 1, 2025 until June 21, 2025, daylight becomes longer. From June 22, 2025 until December 21, 2025, daylight becomes shorter. From December 22, 2025 until May 31, 2026, daylight becomes longer.
Equation of Time vs Day of the Year
We show the equation of time during 2025. In the graph, the day of the year in the x axis starting from January, and the difference between mean solar time and apparent solar time in the y axis.
The day with the highest negative value is Saturday, September 13 2025.
The day with the highest positive value is Thursday, June 5 2025.
Apparent solar time and mean solar time are of the same length on the following days of the year:
- Sunday, January 12 2025 (Day 12)
- Thursday, April 3 2025 (Day 93)
- Sunday, July 27 2025 (Day 208)
- Saturday, November 15 2025 (Day 319)
Schedule of Solar Events
Time of sunrise, sunset, dawn and dusk in Mariehamn during 2025.
- From January 1, 2025 until March 23, 2025, night does not occur.
- From January 1, 2025 until March 23, 2025, astronomical Dusk does not occur.
- From January 1, 2025 until March 23, 2025, astronomical Dawn does not occur.
- From January 1, 2025 until March 23, 2025, night does not occur.
- From January 1, 2025 until March 4, 2025, nautical Dusk does not occur.
- From January 1, 2025 until March 3, 2025, nautical Dawn does not occur.
