Noun
The gathering and bringing home of the harvest; the time of harvest.
The song sung by reapers at the feast made at the close of the harvest; the feast itself.
A service of thanksgiving, at harvest time, in the Church of England and in the Protestant Episcopal Church in the United States.
The opportunity of gathering treasure.
Source: Webster's dictionaryharvest home
Hence, Harvest Home, Thanksgiving and lately Oktoberfest are celebrated. Source: Internet