Today marks the longest day of the year, with summer officially in full swing. The summer solstice will occur at 10:42 p.m., allowing us to soak up extra daylight. What is the summer ...

The summer solstice explained: Why the day is so long The longest day of the year, otherwise known as the summer solstice, has fallen on June 21, marking the astronomical start to the season.

The 2025 winter solstice happens on Sunday, Dec. 21, bringing the longest night and marking the start of astronomical winter.

December 21 marks the shortest day and the longest night in the Northern Hemisphere. What causes this change? Read on to know the celestial phenomenon behind it.

On Sunday, Dec. 21, at exactly 10:03 a.m. EST, the Northern Hemisphere's astronomical winter officially begins with the ...

Long before modern science explained the phenomenon, ancient cultures recognized the solstice as a moment of renewal.