How to read this calendar
Choose a year, month and IANA time zone, then create the calendar. Each date shows the Moon at noon in that zone: its phase name, a schematic disc and the illuminated fraction. A percentage describes the sunlit portion of the visible lunar disc, not brightness, visibility or the chance of seeing it. The calendar starts on Monday.
Main phases and daily pictures
New moon, first quarter, full moon and last quarter are events at specific instants. Their calculated times appear in the calendar and in the list below it. A daily picture represents noon, so it can differ slightly from a phase that happens that evening. The eight daily phase names classify the calculated angle; they are not additional timed events.
Time zones: two useful examples
In January 2026, the full moon is around 10:03 UTC on January 3. Choosing Asia/Tokyo places that event around 19:03 on the same date. The June 2026 full moon is near 23:56 UTC on June 29; in Tokyo it falls on June 30. Engine estimates may differ by a minute or two from a reference table. Always read the selected zone and UTC offset beside each event.
Calculation and limits
Astronomy Engine calculates the Earth-centred phase angle and illuminated fraction locally. This tool supports 1900–2100 and uses your browser’s time-zone database, including daylight-saving rules. Future civil time-zone rules can change. An entirely skipped civil date has no noon sample. Disc orientation is a northern or southern schematic; it does not calculate your horizon, latitude or the Moon’s rise and set. It is not a weather, eclipse or lunar-calendar forecast.
Print or save a month
After changing the year, month or zone, create the calendar again. Then use Print / save as PDF and select landscape paper; switch off browser headers and footers. Check the preview before saving. Mobile keeps the calendar compact and repeats full event times in the list below. No sign-in, location permission or network data request is needed for the calculation.
Frequently asked questions
Why does another calendar show a different date? Check its time zone and whether it lists an instant or a daily sample. Does 100% mean an eclipse? No; lunar eclipses require additional orbital conditions. Is the image a photograph? No, it is a geometric illustration from the calculated illumination. Can I enter a city? Use its IANA zone, such as Europe/London; coordinates are not used. Does changing hemispheres change the times? No, it only rotates the schematic disc.