--- title: "Moon Phase Calendar: Month View with % Lit | Moon Huddle" description: "Moon phase calendar for any month from 1900 to 2100: the Moon drawn for every day, percent lit and exact quarter and full moon times in your time zone." url: https://moonhuddle.cyou/ --- # Moon phase calendar The Moon for every day of the month, drawn as it looks from your part of the world, with how much of it is lit and the exact times of new, quarter and full moon. ## Reading the calendar Each square shows the Moon at local noon for the place you choose, with the lit part in silver and the percentage of the disc that is lit. A day is labelled **New Moon**, **First Quarter**, **Full Moon** or **Last Quarter** when that exact moment falls on it in your time zone, and the time is shown in the square. Choose any day to see its moonrise, moonset and the Moon's age in days since the last new moon. Move with the arrows or the month and year boxes; *Print this month* gives a one-page landscape copy, and the CSV has every day's figures for a spreadsheet. ## Why your location matters A phase happens at the same instant everywhere, but the date it lands on depends on your time zone: the Hunter's Moon of 26 October 2026 (04:12 UTC) is still the evening of the 25th in Los Angeles. The picture changes too. Seen from the Southern Hemisphere the Moon is upside down compared with the view from the north, so a waxing Moon is lit on the left. The calendar flips its drawings for southern places automatically; close to the equator a crescent lies tipped on its back, more like a bowl. ## How it is calculated Positions of the Sun and Moon follow Jean Meeus's *Astronomical Algorithms* and are worked out in your browser. Phase times match the US Naval Observatory's published 2026 times to within a minute, and the percentage lit is measured at local noon, as in the Naval Observatory's tables. ## Sources - US Naval Observatory, [Phases of the Moon and Percent of the Moon Illuminated](https://aa.usno.navy.mil/faq/moon_phases) and [Phases of the Moon data service](https://aa.usno.navy.mil/data/MoonPhases). - Jean Meeus, *Astronomical Algorithms*, 2nd ed., Willmann-Bell, 1998, chapters 47–49 ([Open Library record](https://openlibrary.org/books/OL24327734M)). ## More moon tools Each tool has its own page and remembers your location, so you only pick it once. - [Moonrise and moonset times](https://moonhuddle.cyou/moonrise-moonset/): Day-by-day rise, set and highest point for any city, in local time. - [Full moon dates and names](https://moonhuddle.cyou/full-moon-dates/): The year's full moons with traditional names, times and moonrise. - [Moon phase for any date](https://moonhuddle.cyou/moon-phase-by-date/): The Moon on a birthday, wedding night or any date from 1900 to 2100. - [Dark-night stargazing planner](https://moonhuddle.cyou/stargazing-planner/): Nights when the sky is fully dark and the Moon is out of the way. ## Recommended Two free tools from elsewhere for the rest of your time online. ### Star-party sign-ups without the spam Planetarium newsletters, eclipse-trip brochures and telescope-shop discount codes all want an email address. CleanTempMail gives you a free temporary inbox with no sign-up; it deletes its messages after three days, so the follow-ups fade like a waning crescent. [Open a temporary inbox](https://cleantempmail.com/) ### Check a telescope shop before you pay Found a bargain on binoculars at a shop you have never heard of? WebTraceCheck's free tools show when a domain was registered and how its security headers are set, and its disposable cloud browser lets you look around the site on a remote machine first. [Look up a shop's domain](https://webtracecheck.com/) ## Questions **Why does a day show 100% without saying Full Moon?** Near full moon the lit fraction changes very slowly, so the day before or after can round to 99 or 100%. Only the day that contains the exact moment of full moon gets the label. **Can I look at other years?** Yes. Type any year from 1900 to 2100, or step month by month with the arrows. Your location, week start and drawing settings are remembered on this device. **Does it work offline?** Yes. Once the page has loaded, every calculation runs on your device, so you can check the calendar at a campsite without signal.