Anniversary Nights Counter

Whatever you want it to be. The tool accepts any past date: the first date, the first kiss, the night you met, the day you became official, your wedding day, or the day you moved in together. For proposal speeches the most common anchor is the first date. For wedding anniversaries the obvious anchor is the wedding date. Pick the one that makes the strongest story when read aloud.

Days divided by the synodic month — the average time between consecutive full moons — which is 29.530588853 days according to the IAU. So 365 days together comes out to roughly 12 full moons. The figure is a floor, not a rounded value: 11.9 full moons displays as 11. Over multi-year ranges the rounding error is well below one full moon, so the count is accurate for anniversary purposes.

Twelve. The International Meteor Organization publishes roughly twelve named meteor showers per year with a zenithal hourly rate above five — the Quadrantids in January, the Lyrids in April, the Eta Aquariids in May, the Perseids in August, the Orionids in October, the Leonids in November, the Geminids in December, plus several minor showers. That gives one shower per month on average, which is what the tool uses.

Both are the same number. A 'night together' is a calendar-day boundary, just like a 'day together' — they count the same. The word 'night' is chosen because the tool is built by a star map company and the most common use case is anniversary or proposal copy that reads better with 'nights under the stars' than 'days on Earth'. The math is identical.

Free with no signup. The date is processed entirely on the server to render this page and is not logged or stored. The URL parameter is the only place the date persists — if you bookmark or share the result page, the date appears in the URL. Clear the URL or close the tab if you do not want to retain that.