sementivae

Of a similar nature -- marking, as Ovid tells us, the completion of the sowing -- was the _feriae sementivae_ or Paganalia, associated with the earth-goddesses, Ceres and Tellus.

The Religion of Ancient Rome Cyril Bailey 1914

At the beginning of the time for seeding and harvesting religious ceremonies were performed to implore the help of their deities: in June for a bountiful harvest, in September for a rich vintage, and in December for the seeding; hence their feriae sementivae, feriae messis, and feri vindimiales.

The Catholic Encyclopedia, Volume 5: Diocese-Fathers of Mercy 1840-1916 1913