This year, the harvest moon falls on Monday, September 20 - just two days prior to the autumn equinox.
Farmers Almanac facts & folklore
The word equinox comes from Latin aequus or “equal,” and nox or “night” because on the equinox, day and night are roughly equal in length. When the sun crosses the equator from north to south, this marks the autumnal [Sep or Oct] equinox and when it crosses from south to north, it marks the vernal [March] equinox.
