Moon Calendar
Daily moon phase and illuminated fraction at noon UTC
About this tool
See how the Moon changes throughout a month. The percentage is the illuminated part of its visible disc; the images have celestial north at the top.
Choose a month or use the arrows. Today returns to the current month. Weeks start on Monday.
Each day is calculated for 12:00 UTC, independently of your location. Phase names describe approximate stages, not the exact times of new moon, full moon or quarters.
This is a low-precision astronomical model for a visual overview (1900–2100), not an observation forecast. No local horizon, weather, libration or terrain. Use an ephemeris for precise event times.