Moon Phases 2025. The first quarter moon occurs between the new moon and the full moon, and the last quarter moon occurs after the full moon and before the next new moon. A new moon is the first lunar phase that happens about once a month or 29.53 days on.

The full moon is the lunar phase when the moon appears fully illuminated from earth’s perspective. Check here all the moon phases of every month of 2025 in the united states.