September 29th is...

Michaelmas Day, the feast of Saints Michael, Gabriel and Raphael (the Archangels); for Anglicans it is the feast of Saint Michael and All Angels. This Christian Feast, like so many others, is derived from the Pagan Autumnal Equinox feasts. It is one of the "four quarter days" signalling the beginning of each quarter of the year and welcoming each of the four seasons.
The entire Autumn season is known traditionally as Michaelmas. Michaelmas fairs were a focal gathering for farmers and merchants. As early as 1014, the laws of Aethelred in England prescribe for a three day fast for all Christians before the feast. Servants were not allowed to work during these days. Michaelmas was when rents were due, and often paid in food.
The traditional Michaelmas fare was goose,it was said that eating something rich like goose at this turning point of the year brings good luck.
Michaelmas signals the beginning of the hunting season for deer and other large game.
This is the time of the year when the god’s power weakens toward his death as the goddess reaches her full maturity as the Crone. It is considered the end of the harvest and a time of gathering for the  forthcoming winter.

St Michael was also the patron saint of the sea and sailors..
Michaelmas celebrates the time when Archangel Michael hurled Lucifer from heaven. Lucifer fell into a blackberry bush, so  no more eating blackberries after this date!
For horse owners, "Blackberry Season" is always a time of year when horses can start to look a bit thin and ragged - you can tell  a good horse owner if his or her horses look well at Michaelmas.
Bright Blessings