The Summer Solstice is the longest day of the year, marking the official start of summer. It happens around June 21st in the Northern Hemisphere when the Earth’s tilt causes the sun to be at its highest point in the sky. This means there is more daylights than any other day, and the sun shines for the longest time. The Summer Solstice is a celebration of warmth, sunshine, and energy that comes with summer. People often enjoy outdoor activities, like picnics, festivals, or watching the sunset to make the most of the long day!