7PM, the second hour of the night on a Sunday, belongs to Mars. Mars's hours were kept for conflict, courage and cutting work: the forging or blessing of blades, the start of a contest, medical procedures involving incision, and protection sought through force rather than persuasion. The grimoire tradition reads Mars hot, dry and martial, and its hour was handled carefully, since the same heat that grants courage can also provoke. Practitioners were counseled to match the work to the hour wherever the two could be arranged together, choosing an hour whose ruling planet suited the operation in hand rather than acting in whatever hour happened to be free; a working that fit its planet well was held to draw strength from the hour, while one that fought the ruling planet's nature was held to labor against it.
Because the same planet returns roughly every seventh hour through the whole day, Mars also rules 2AM and 12PM elsewhere on this reference Sunday, so a practitioner without access to 7PM specifically could look to those instead for work of the same character. The hour sits inside a wider correspondence system built around the same seven planets: Mars is paired with the metal iron, with red, and with Tuesday, the weekday carrying its name in full as well as its first hour. A working timed to 7PM was traditionally strengthened further by choosing Tuesday itself and by using that metal and color in the object the working required, and the same logic timed ordinary practical acts as well as ritual, from gathering herbs held sacred to a planet to medical treatments believed to answer best to its temperament.