An anniversary print
Paper is the first anniversary, so a print counts. Add the night you met, the proposal and the wedding, put your names in the title and a line at the bottom.
Got married in the afternoon? Add the time: the moon moves about half a degree an hour, which matters only close to a full or new moon.
Questions
How do you work out the phase?
From the positions of the Sun and the Moon at the time you pick, using a shortened version of the formulas in Jean Meeus's Astronomical Algorithms. It's good to a few minutes for full and new moons. If you leave the time blank we use 9 in the evening, your time, the night of that date.
Is the moon picture real?
The moon is a photographic texture and the shadow is drawn from the maths for your date, so a waxing crescent is lit on the right and a waning one on the left, as seen from the northern hemisphere. Choose Southern hemisphere to turn it the way it looked from there.
Can I print it?
Yes. Downloads are PNG files at 300 dpi for A4, 8 × 10 in, 11 × 14 in and a 30 cm square, plus a phone size for sharing. Print at home on matte paper or take the file to any print shop. Free for personal use.
How many dates can I add?
Up to six. With one, the moon fills the print; with more, each gets its own name and date underneath.
Do you keep my dates?
No. Names and dates stay on this device. We count page views without cookies.