The Kalends and the Nones of each month are sacred to Juno, and the Ides to Jupiter. Special rituals to those deities should be performed on said days before one's lararium.
In the beginning, the Romans employed a lunar calendar as most ancient peoples did and as observant Jews still do (and as Hellenic Reconstructionists do). The three main days of the months were tethered to lunar phases:
Kalends = New Moon
Nones = Half Moon
Ides = Full Moon
This makes sense since some of the epithets of the two deities are concerned with light (Juno Lucetia, Jupiter Lucetius).
Julius Caesar's reforms switched to a solar calendar and fixed the three main days, making the lunar phases mostly irrelevant. Thus the Ides fall on the thirteenth or fifteenth of a month and is considered sacred to Jupiter, regardless of whether or not the moon is full.
My question is: wouldn't it be better to revert to the old practice of honoring Lupiter and Luno on the relevant lunar phase regardless of the calendar day? There is something about a full moon that is striking and suggests the power of a deity. I can certainly see why Wiccans make the full moon their main event.
This question might seem trivial, but if you are particularly devoted to Jupiter and Juno, and all Rome is to some extent, it is food for thought.