Moon Reckoning
Why this site exists

About

There are hundreds of moon calendars in English. Almost all of them print one reading of a lunar day with no author on it, as if there were only one tradition and it agreed with itself. There is not, and it does not.

A moon calendar for people who want to know where a claim came from

What this is

Two things at once: an accurate calendar, and an honest set of readings.

The calendar half is ordinary astronomy, computed properly and shown in your own local time, for the place you are standing. The reading half is tradition, and tradition is treated here the way a decent book treats it: named, dated, and quoted with the disagreements left in.

That second half is the reason the site was built. The lunar days in particular rest on four separate author lines, one of them medieval and three of them Russian and modern, and they contradict each other on the days people search for most. Nobody writing in English shows that.

A static site with no server behind it

How it is built

Everything you see is worked out by your own browser.

  • No accountThere is nothing to sign up forNo login, no newsletter wall, no profile, and nothing to delete later.
  • No serverThe pages are filesPositions, times and lunar days are computed in the page itself, so nothing about you is sent anywhere to produce them.
  • No advertisingNothing is sold on these pagesIf that ever changes it will be one quiet placement, never in the middle of a reading, never a popup, never something that follows you down the page, and the privacy page will say so before it appears.

The full list of the libraries, maps and books behind the site is on the sources page, with the licence of each one.

The same rules the sources page states, in short

What it will not do

  • 01Dress a tradition up as a factEvery reading carries the name of the person who wrote it, in the same breath.
  • 02Hide a disagreementWhere the authors differ, all of them are printed.
  • 03Fill a gap by inventingFive of the thirty lunar days are thinly documented, and those pages stay short and say so.
  • 04Ask you for anythingNo email address, no birth data stored, no tracking across other sites.

Especially welcome on anything with a source beside it

Corrections

If something here is wrong, that is worth more to us than a compliment.

A wrong time, a source that does not say what we claim it says, a reading attributed to the wrong author: write, and it gets fixed and noted. The contact page has the address.