Thus, wine is depicted being offered, often by statuettes of the king on the palanquin, or within the shrine; incense is burnt; libations are poured; bouquets and piles of offerings are presented. These are among the most common ritual acts depicted on temple walls and called for in temple liturgies. Priests practiced these rites daily. They also practiced them in processions on a regular basis. Thus, there were only a few special episodes, such as cutting the grain, which were not acts performed at least several times a month by the performers. This repetition stabilized the festival celebration and incorporated the powerful–and potentially dangerous–elements of the festival into the predictable fabric of everyday life.
– Ancient Egyptian Temple Ritual, Katherine Eaton
I think this may be one of the hardest things to really get under the skin about Egyptian stuff, this idea that breaks in the daily routine are perilous, more prone to things going wrong, and need to be normalised.
I think that a lot of people are more accustomed to an idea of festival time as celebration, as special, as holiday, and certainly there are aspects of that to many festivals, but the precariousness of non-standard time is also a thing that has to be handled gentle, and hemmed in with normalcy, to keep it all grounded.