It does not appear in the calendars because it belongs to the category of feriae conceptivae, festivals fixed from time to time. However, it seems to have taken place mostly in January, immediately after another conceptiva festival, the feriae sementivae, with which it also shared an agrarian character. Nothing is known of the deities to which the festival was dedicated.
Bibl.: W. Warde Fowler, Roman festivals, London 1899, pp. 294 ff.; G. Wissowa, Religion und Kultus der Römer, 2nd ed., Munich 1912, pp. 439 ff.