A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
From: Tony Oz
Date: 2018 Apr 5, 11:52 -0700
I'm looking at this table trying to invent a rule to remember on which day an equinox and a solstice would happen.
So far I could suspect that:
- vernal equinox is always on March 20
- summer solstice is on June 20 if it is a leap year, otherwise it is on June 21
- autumn equinox is on September 22 if it is a leap year or a year right after the leap one, otherwise it is on September 23
- winter solstice is on December 21 unless it is a third year in the leap years sequence, when it is on December 22
Is my speculation correct?
I need this to re-create the date scale (of a quadrant) properly for an arbitrary year number.