#holy month

veriloquium:

September, from the Latin September, meaning “seventh month.” The -mber suffix comes from the Latin membris, meaning “month.” In the original Roman calendar, the year began in March, hence September was the seventh month. It replaced the Old English hærfestmonað, “month of harvest/autumn.“ 

In Old English, September was also called haligmonað, “holy month,” probably in reference to the harvest and in thanksgiving for the year’s crops.