The part of Earth that gets the most of day light during any other day of the year is referred to as the longest day of the year. Usually, Summer solstice is the longest day of the year in Northern or Southern hemisphere. Summer solstice take twice a year once in Northern hemisphere between June 20 and June 22 and once in Southern hemisphere between Dec 20 and Dec 22.
Depending on the location the day duration varies. Lets divide Earth into three parts to understand the day length on summer solstice.
- North to Equator (Northern Hemisphere)
- South to Equator (Southern Hemisphere)
- On the equator day and night is of the same length throughout the year. A slight difference of 10 minutes between day and night duration occurs.
- On Northern Hemisphere Summer Solstice is the time when day duration is the longest. Summer solstice 2020 will occur on June 20 this year. For the Northern Hemisphere this will the longest day of the year.
- On Southern Hemisphere Summer solstice is the longest day of the year taking place on Dec 20 this year.