Ask why a working failed and you will hear about faith, focus, or fate. Ask an old grimoire and it will ask you a scheduling question: what hour was it? The planetary hours are the oldest calendar the Craft still uses, and they are simpler than their reputation.
How the system works
Divide the time between sunrise and sunset by twelve. Those are the day hours. Divide sunset to the next sunrise by twelve. Those are the night hours. They stretch and shrink with the season, which is the point: the system breathes with the actual sky, not the clock.
The hours are ruled in a repeating sequence called the Chaldean order: Saturn, Jupiter, Mars, Sun, Venus, Mercury, Moon. The first hour of each day belongs to the planet the day is named for. Sunday opens with the Sun, Monday with the Moon, Saturday with Saturn, and the sequence proceeds from there. Any planetary hours app or table will do this arithmetic for you. Knowing the logic is what keeps you from being superstitious about the result.
What each hour is for
Saturn: binding, banishing, endings, discipline, anything that needs a boundary. Jupiter: growth, prosperity, petitions to authority, generosity. Mars: courage, severance, defense, work that needs heat. Sun: success, visibility, vitality, the signature on the deal. Venus: love, reconciliation, beauty, the arts of attraction. Mercury: divination, communication, contracts, travel, study. Moon: dreamwork, intuition, the household, anything tidal.
Notice what this is: a filing system for intention. The same match burns differently depending on which room you strike it in.
A worked example
You want to end a pattern: a habit, an attachment, a slow leak. The analyst's schedule reads: Saturn's hour, waning moon if you can get it, Saturday if you can wait for it. Light the black candle then. Same candle, same words, better room.
The caveat that keeps you honest
Timing is a multiplier, not a substitute. A working with no clarity behind it fails at any hour, and a precise one succeeds in most of them. Use the hours the way a sailor uses the tide: it does not row the boat, and only a fool rows against it.
For the folklore behind the deepest night hours, read The Witching Hour. And if you want this material taught directly, with your own practice as the syllabus, that is what the Apprenticeship is for.
Max Genie writes the analyst's column of the Journal: tarot and the Western mysteries with the sentiment removed and the precision kept.