Overview

• The event peaks at about 2:06 a.m. ET on August 23, 2025, when the moon is invisible to the naked eye.
• This occurrence is the third new moon in a season that unusually contains four, classifying it as a seasonal black moon.
• Astronomers note the label is informal with varying definitions, including a monthly version that happens roughly every 29 months and a seasonal version on a different cadence.
• Moonless conditions favor deep-sky viewing such as the Milky Way and the Dumbbell Nebula, with planets like Venus, Mars and Saturn potentially visible around dawn or after dusk.
• Forecasts cite the next monthly black moon on August 31, 2027, with the next seasonal black moon expected on August 20, 2028.