The calendar, and the sky above it
Printable calendars with every US federal holiday and moon phase on them, and a working almanac for the nights in between: tonight’s moon, the next eclipse, the day the seasons turn.
Calendars made for paper
Every calendar here is built to be printed: the year on one landscape sheet, each month on its own portrait page with room to write. Federal holidays are shaded, their observed days are moved the way OPM moves them, and the four principal moon phases sit in the corner of their day, timed for the zone you choose.
Why the moon keeps moving on your calendar
A lunar month, new moon to new moon, averages 29.53 days, which does not divide evenly into any of our months. So the full moon drifts about a day earlier each month, and roughly every two and a half years a month catches two of them (the second is what people call a blue moon). Twelve lunations add up to only about 354 days, eleven short of a solar year: the gap that lunar calendars like the Islamic Hijri calendar let run free and that lunisolar ones like the Hebrew and Chinese calendars close with a leap month.
Farmers’ almanacs once printed the phases a year ahead so people could plan planting, fishing and night travel around moonlight, and our printable months carry the same glyphs. Before you pencil next month’s full moon onto the fridge calendar, ahaboo has a narrated explainer on why the Moon has phases in the first place.
The sky almanac
- Moon phase todayPhase, illumination, moonrise and the moon on any date
- Moon phase calendarEvery new, quarter and full moon, 2025–2028
- Solar eclipsesNext eclipse and what you’ll see from your town
- Sunrise & sunsetTwilight, golden hour and day length anywhere
- Meteor showersPeaks from the IMO calendar, with moonlight rated
- Daylight saving timeWhen the clocks change, US and Europe
- Night sky plannerAn evening’s almanac for any place, with an AI guide