Pick a date, print the sky
Every phase from 1901 to 2100, drawn to the degree and ready to save as a print or a lock screen. No account, no upload, no watermark.
Two PNG files, 1000 x 1500 and 1290 x 2796. Nothing is uploaded - the image is drawn in your browser.
Three hundred and sixty-six pages, one for each date, each with the phase for that day printed year by year.
Twelve month names, plus the three that get searched for hardest. One of them is a real colour and the rest are calendars.
Centre of the band at 0 degrees
Centre of the band at 45 degrees
Centre of the band at 90 degrees
Centre of the band at 135 degrees
Centre of the band at 180 degrees
Centre of the band at 225 degrees
Centre of the band at 270 degrees
Centre of the band at 315 degrees
The moon takes 29 days, 12 hours and 44 minutes to go from one new moon to the next. That number never lands neatly on a calendar month, which is why the same date carries a different moon almost every year - and why the grid on each date page looks scattered rather than repeating.
Almost. Nineteen years is very close to 235 of those cycles, so the moon on your birthday looks near enough identical to the moon on your nineteenth birthday. The old name for that coincidence is the Metonic cycle, and you can see it in the grid: read down twenty years and the first and last rows are near twins.
Positions here follow the standard truncated series for solar and lunar longitude. The illumination is the fraction of the disc lit at 12:00 UTC, so a date near a phase boundary can shift a name by a few hours either way.
Put two dates together and see whether the lit halves add up to one whole moon.