The Solstice is an astronomical event that happens twice, once in summer and once in winter, each year when the Sun reaches its highest position in the sky as seen from the North or South Pole. During Solstices the tilt of the axis of the Earth (with respect to the Sun) is the maximum at 23° 26′. The International Space Station(ISS) generally reaches a period of full illumination favoring the northern hemisphere around this time.
During June it is Summer Solstice in the Northern hemisphere and Winter Solstice in the Southern hemisphere. In other words during June Solstice it is summer time in the UK, the USA, Canada, Russia, India and China and it is the longest day of the year while it is winter time in Australia, Argentina, Chile, New Zealand and South Africa and it is the shortest day of the year.
Summer Solstice Time in India:
Sunset = 18:53
Next Day Duration = 13 Hours 10 Mins
Note: Grishma Ritu (Indian Summer) ends with Summer Solstice and Varsha Ritu (Indian Monsoon) starts with Summer Solstice.