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Moon Phase Calendar

See the approximate moon phase for every day of any month.

What the calendar is showing

Each day is given one of eight familiar lunar-phase symbols, from new moon through waxing phases to full moon and back through the waning phases. This makes the month easy to scan at a glance. It is a practical visual guide to the shape of the lunar cycle rather than a precision astronomical ephemeris with exact illumination percentages and phase times.

Good real-world uses

The monthly view is useful when you want to compare several dates rather than check only tonight's moon. A photographer might look for weekends near a full moon for moonlit landscapes, while a stargazer may prefer darker nights nearer a new moon. Campers, hikers, educators and anyone teaching the lunar cycle can also use the calendar to see how the phase changes gradually from one date to the next.

Why the phase can differ from a specialist astronomy source

The page uses a lightweight mathematical approximation of the roughly 29.53-day synodic lunar cycle and maps each date to one of eight phase icons. The real Moon changes continuously, and the exact instant of a new moon, quarter or full moon depends on astronomical calculation and your timezone. For telescope sessions, eclipse work, navigation or other precision uses, confirm the date and time with a specialist astronomical source.

Moon phase versus moonrise time

A full moon symbol does not mean the Moon is visible all night from every location, and a new moon symbol does not tell you when it rises or sets. Visibility depends on location, local horizon, weather and the Moon's rise and set times. Use this calendar for the phase pattern, then pair it with location-specific rise/set information if the actual viewing window matters.

How to read the pattern

Choose a month and year, then follow the icons across the weeks. Waxing means the illuminated portion is increasing toward full moon; waning means it is decreasing after full moon. For a single-date summary, compare this monthly view with the Moon Phase tool.