The best time to carry out spells and rituals
If a need is urgent then you can work at anytime and picture the full moon or rising dawn whose energies you need, even at a different time of the month or at darkest midnight.
Sometimes the nature of the ritual will dictate the timing. For example, a new beginning spell can be launched on any new date; the first day of the month, the first day of the year, any Sunday the first day of the week, the first hour after dawn or at the crescent moon when it first appears in the sky. Best of all is the first hour after dawn on a Sunday, which is ruled by the Sun, and so offers a double dose of power for that new beginning.