The longest day of the year, and the official start of summer, has arrived in the U.S. The summer solstice takes place Friday, June 20, and will be both the longest day and shortest night of 2025 in ...

Summer solstice is the longest day of the year. Here's why it can occur on June 20, June 21 or June 22. Plus: Solstice 2025 events in metro Phoenix.

The summer solstice marks the beginning of astronomical summer each year, typically falling between June 20 and June 22. In ...