(Roman) While the Lares and Di Penates are honored every day in the pious Roman household, the Nones (celebrated on either the 5th or 7th day of the month according to the month) are days when a more elaborate ceremony should be observed. The Nones are sacred to Iuno Covella (Iuno of the Hollow Moon).
The Nones ritual is usually celebrated early in the morning at sunrise by the head of the household (usually the eldest male). If circumstances (or family tradition) dictate, it may be performed at noon or before sunset. No sexual activity is permitted prior to the rite. The performer of the rite does not break his fast prior to performing the rite (if celebrated at sunrise); only a little tea or coffee is permitted. (http://www.novaroma.org/religio_romana/ritual_nones_l.html)