There are three primary timing considerations for Hoodoo.  I list them in order of my personal preference.  Other rootworkers may operate under other preferences.  Feel free to choose the preference that works best for you.

By Day of the Week

I prefer to do my spell casting by the day of the week as per the following chart.

Sunday: Success; Achievement; Goals; Purification
Monday: Emotional Healing; Nurturing; Calming; Fertility
Tuesday: Protection; Conflict; War
Wednesday: Communications; Speed, Reversing Spells, Artistic; Creativity; Road Opener
Thursday: Healing; Protection; Money
Friday: Love, and Drawing (often money drawing - because Venus is associated with the color green, and Friday was and is associated with payday)
Saturday: Crossing, Cursing, Debauchery

Please note that as a Jew, I often do my blessing and healing work on Friday Night after sundown as part of my Sabbath ritual.

Time of Day

You can also time your work based on the hands of the clock.  For drawing work, such as drawing love, money, success, luck, healing, blessing, etc, you would do the work when the hands of the clock are rising.  For removal or cursing work such as uncrossing, hot foot, cast off evil, break up, etc, you would do the work when the hands of the clock are falling.

Rising: Both hands are between the 6 and the 12. Example: 6:30, 9:45, 11:55, etc
Falling: Both hands are between the 12 and the 6. Example: 12:15, 3:25, 5:10, etc

Time of the Moon

As is traditional in Wiccan practice and many rootwork practices you can time your work based on the time of the moon.  By the waning moon you would schedule cursing or removal work.  By the waxing moon you would schedule drawing or attracting work.

The waning moon lessens or removes conditions and the waxing moon increases or draws conditions

Other Considerations

There are other considerations for time that are not as commonly used, but when combined together can offer a powerful foundation for your work.

Astrological Timing – When the hour of the planet is in the day of the planet, such as the Hour of Jupiter on Thursday, the Day of Jupiter.  Best still if the time coincides with the correct rising or falling of the hands.

Day of the Year – Valentines Day, Spring Equinox, New Moon, Full Moon, anniversary of a marriage, divorce or birth, on the Wiccan Sabbats, on a Christian or Jewish Holiday, etc.

There are of course many more methods to this.  I hope this gives you an overview of when you should do your own spell casting.  For my personal practice, I have tried most variations of these, and have found that working by the day to be more then suitable for my needs and the needs of my clients.

Lara
Black Cat Root Shack