A Modern Lunar Almanac
A calendar that follows the Moon.
Explore each lunar month, follow the sky, and keep your observations alongside it.
Free prerelease for web and Android.
Loading the live lunar calendar…
Swipe through the months. Select a day to explore below.
Your day in LuNAC
Your day, under
the same sky.
Take a look around. This is LuNAC.
A little room for everyday life
Start with a day.
A walk. Coffee with a friend. A few plants to water. Your plans have a place alongside the sky.
Tap + Add event on the phone.
Sample personal schedule · changes reset on refresh.
Opening the live LuNAC demo…
The Timeline
Your life, alongside the sky.
The first frost. A garden in bloom. A moment you want to remember. Keep your observations alongside lunar phases, planetary events and the changing seasons.
Loading the live Timeline…
Swipe left or right to move through time. Tap Now to return to today.
Explore the full Timeline →From the Timeline to the page
Keep noticing, on paper.
Keep a whole Moon Month in view, and build a record of what you notice in your own handwriting.
Central Time Edition
The 2027 LuNAC Lunar Almanac
A printed 13 moon calendar organized from New Moon to New Moon. Each of its thirteen complete Moon Months pairs a lunar calendar with a celestial Timeline and space for handwritten observations.
- Follow the month from New Moon to New Moon.
- Each Moon Month follows one complete lunar cycle. Moon phases, numbered lunar days and Gregorian dates stay together on the page.
- See the calendar and Timeline together.
- Follow daily details above and the month’s sky events below, with an event index for their times.
- Make the record your own.
- A first bloom. Changing weather. A moment worth keeping. Write down what you notice, then return to it as the Moon Months unfold.
Ordering not yet available
Behind every Moon Month
Astronomy you can check.
The lunar phases and sky events you’ve been exploring come from astronomical calculations. LuNAC builds on Astronomy Engine and keeps the source and calculation details with its results.
Try it here: select a Moon phase or sky event to open its details. Scroll to inspect its timing, method and source. Tap the dimmed Timeline above the panel to close it and choose another event.
Follow the sky. See where the information comes from.
How LuNAC’s astronomical calculations work →Open an event. Follow its source.
Loading sky events and their sources…
Why I built LuNAC
Before there was an app,
there was a question.
LuNAC began in an Excel spreadsheet: a way to follow real lunar cycles and keep a record of everyday observations alongside them.
Read the story behind LuNAC →“I wanted to compare lunar, planetary, and other celestial cycles with what I noticed in plants, people, and everyday life.”
Before you begin
About LuNAC and lunar calendars
What is a lunar calendar?
A lunar calendar organizes months around the Moon’s cycle of phases. LuNAC follows each cycle from New Moon to New Moon, keeping Gregorian dates visible alongside its lunar days so you can use it for everyday planning.
How does a New Moon to New Moon calendar work?
Each month begins at New Moon and continues until the next New Moon. LuNAC organizes its calendar around these lunar cycles, with Gregorian dates alongside them for everyday planning. Each Moon Month follows the actual cycle, so its length varies and its boundaries can cross Gregorian months.
Is LuNAC a 13 moon calendar?
LuNAC is a lunar calendar for following complete Moon Months from New Moon to New Moon. If you’re looking for a 13 moon calendar, the 2027 LuNAC Lunar Almanac brings thirteen complete Moon Months together in print. Each month follows the actual lunar cycle, with its own length, calendar and Timeline. Explore the 2027 lunar almanac →
How is LuNAC different from a Moon phase tracker?
LuNAC uses the lunar cycle to organize the calendar itself. Alongside Moon phases, it brings together a celestial Timeline, personal scheduling and observations, so you can follow the sky and build a record of what you notice over time.
Can I keep a lunar journal and record observations?
Yes. You can use LuNAC as a lunar journal by recording observations of plants, weather and everyday life alongside lunar phases and sky events on your Timeline. An account lets you keep your own record. The homepage observation tour lets you try the flow with practice entries.
Is LuNAC free, and do I need an account?
The current LuNAC prerelease is free, with no subscription or in-app purchase, for web and Android. You can explore the public calendar, Timeline and homepage demos without an account. Create an account to keep your own observations and use personal features; homepage demo entries are for practice.
Is there a printed lunar calendar for 2027?
Yes. The 2027 LuNAC Lunar Almanac pairs thirteen complete New Moon to New Moon calendars with celestial Timelines and space for handwritten observations. The Central Time Edition displays event times in Central Time. You can preview its pages now; ordering is not yet available. See the printed lunar calendar →
Your next Moon Month
Follow the Moon.
See what you notice.
Make plans, follow the sky, and start a record of your own.
Free prerelease for web and Android.