The Longest Day In June 2024. In india, this year the summer solstice will be observed on 21 june 2024 at. Thursday, june 20 is the official first day of northern astronomical summer for 2024 — summer solstice — which is the longest day of the year for this half of the planet.

In india, this year the summer solstice will be observed on 21 june 2024 at. Edt on june 20, according to timeanddate.com.