Length of Days in Vostok
We show daylight length in Vostok during 2025 and the equinoxes and solstices. From June 1, 2025 until August 20, 2025, daylight does not vary. From August 21, 2025 until October 19, 2025, daylight becomes longer. From October 20, 2025 until February 21, 2026, daylight does not vary. From February 22, 2026 until April 23, 2026, daylight becomes shorter. From April 24, 2026 until May 31, 2026, daylight does not vary.
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 Sunday, September 14 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 Vostok during 2025.
- From April 7, 2025 until November 7, 2025, astronomical Dawn does not occur.
- From April 7, 2025 until November 7, 2025, night does not occur.
- From April 8, 2025 until November 6, 2025, night does not occur.
- From April 8, 2025 until November 6, 2025, astronomical Dusk does not occur.
- From April 23, 2025 until October 23, 2025, nautical Dawn does not occur.
- From April 23, 2025 until October 21, 2025, nautical Dusk does not occur.
- From January 1, 2025 until March 4, 2025, civil Dusk does not occur.
- From January 1, 2025 until March 4, 2025, civil Dawn does not occur.
