Question

why is 21 june is the longest day of the nothern hemisphere

Answer 1

While it's already been hot for weeks, summer doesn't officially start until the summer solstice, which falls on Thursday, June 21 this year. The summer solstice, which is the longest day of the year, officially starts Thursday morning in the Northern Hemisphere.

Answer 2

While it's already been hot for weeks, summer doesn't officially start until the summer solstice, which falls on Thursday, June 21 this year. The summer solstice, which is the longest day of the year, officially starts Thursday morning in the Northern Hemisphere.