This week is one of those with the quarterly Ember Days. The FSSP Minute Missive this week is an excellent study of the history, symbolism, theology and practice of these ancient harvest times assigned to thanksgiving for the bounty of the earth. They survive in the 1962 Missal, but were dropped from that of 1970. Happily they have been restored - or carried over perhaps - in the Ordinariate books, having survived in the BCP, if not in the ASB and its successors.
The article by Fr William Rock FSSP can be seen at September Embertide and the Christianizing of Eden
Happy Embertide to my readers