The Reckoning
Moon · Sun · season · observation
The Gerímbóc is a reckoning, not a substitute for the heavens.
Tables, cycles, and calculated dates allow the year to be anticipated and remembered; they give discipline to observance and make it possible for a cynn to keep a common calendar across many years. They remain, however, approximations of a living pattern. Sun, Moon, and season are not made true by the book.
Reckoning and Observation
Observation therefore has the final word. If a calculated cycle drifts from what can actually be seen, the reckoning must be corrected; the purpose of calculation is to remain faithful to the pattern, and when pattern and calculation part company, calculation has failed.
This is part of the method rather than a defect in it. A traditional calendar belongs to people who watch the sky, notice the season, and correct their reckoning when necessary.
The Observational Record
The record below contains the lunar observations entered for the present reckoning. Night I is given by the civil date of its beginning evening; the reference reckoning uses America/New_York, with the night boundary at 18:00 local time.
| Month | Night I begins | Observed fullness |
|---|---|---|
| Háligmónaþ | 10 September 2026 | 26 September 2026 |
The entered record notes the new Moon at the beginning of Night I. A missing fullness entry means that an observation has not been entered here; it does not mean that the full Moon has not occurred. These entries are a record of observation, not a complete calendar of the year’s holy tides.

