The heptagram can represent the seven days of the week. In Judeo-Christian context, it can therefore be a symbol of completion, as the universe was wholly created within the seven-day week.
In addition, the each day of the week is associated with one of the planets.
By following the circle counter-clockwise, starting at the moon, you find that the planets are listed in the order in which they were understood to exist in an earth-centric system: Moon, Mercury, Venus, Sun, Mars, Jupiter, Saturn.
By following the lines of the acute heptagram, you find them listed in the order of the days of the week: Moon (Monday), Mars (Tuesday), Mercury (Wednesday), Jupiter (Thursday), Venus (Friday), Saturn (Saturday) and the Sun (Sunday).
Read more: Additional Meanings for the Heptagram
