The different hours of the day have different ruling planets.

To work this out, you will have to find out what time the sun rises in the morning.  (The weather report sometimes has this information for the following day, and you should be able to find out online) The hours of Magick start at Sunrise with hour 1. 

For example, if Sunday's sunrise is 6:15 a.m. From 6:15 - 7:15 is Hour 1, and is ruled by the Sun (Because it is Sunday). The hour from 7:15  to 8:15 is hour 2,  which ruled by Venus etc. Monday’s sunrise may be at 6:22, which makes hour 1 from 6:22 - 7:22 but is now ruled by the Moon. Each day's first hour is ruled by itself. It then runs through the chart until the next days ruling planet takes over and begins again.  You may choose to do a spell on a particular hour so that the Planetary power can be added to the spell.