June 21 is the longest day of the year for the Northern Hemisphere, which includes Pakistan and India making the summer solstice.
The astronomical event occurs when the Earth's axial tilt is most inclined towards the Sun, resulting in the longest day and the shortest night.
Summer solstice occurs when the Earth's axis is tilted about 23.5 degrees relative to its orbit around the Sun.
On this day, the North Pole is tilted closest to the Sun, allowing the Sun to reach its highest position in the sky at noon. This results in regions in the Northern Hemisphere experiencing extended daylight hours.
Cities closer to the equator will have slightly shorter daylight hours compared to those farther north.
Traditionally, the solstice marks the longest day and the start of summer.
As the Earth continues its orbit around the Sun, the days will gradually shorten after the summer solstice, leading up to the winter solstice in December, which will be the shortest day of the year.
