Lunar Structure

Lunar Structure (M1–M13)

The Light Calendar includes a simple moon cycle index.
Each lunar cycle belongs to the year in which its full moon occurs.

Rules

• Luna numbering: M1–M13
• A lunar cycle begins at the astronomical new moon, rounded by a natural rule:
  • New moon before 12:00 UTC → previous night
  • After 12:00 UTC → same day
• Users see the moon day in their own timezone.

Example Notation

´Μ11·19(16/30)´

Meaning:

• Μ11 → 11th moon of the year
• 19 → today's moon day
• 16 → full moon occurred on the 16th day of this cycle
• 30 → cycle length (29 or 30 days)

Purpose

Provides lunar orientation without a separate lunar calendar.