Summer Solstice, Friday, June 21st, 2019
Summer Solstice: Friday, June 21, 2019 at 4:54pm in Dublin. In terms of daylight, this day is 9 hours, 30 minutes longer than on December Solstice. In most locations north of Equator, the longest day of the year is around this date.
The longest day of the year arrives when the sun is directly over the Tropic of Cancer. To be more specific, right over the 23.5 degrees North latitude. It is the day when the Northern Hemisphere receives maximum sunlight.