This article records tradition as it has been passed down and reported. Its sources are not yet part of the atlas's verified catalogue.
A day entry records one of the seven days of the planetary week, its ordinal position, the classical planet that rules it, and the naming history behind it. Several English day names, Sunday, Monday and Saturday among them, keep the ruling planet's own name or a direct Latin translation of it, while others, Tuesday, Wednesday, Thursday and Friday, substitute a Germanic deity judged by early translators to correspond to the Roman planetary god the day was named for, Tiw for Mars, Woden for Mercury, Thor for Jupiter, Frigg for Venus.
An entry records how a day's own position in the seven day week follows from the Chaldean planetary order applied to the planetary hours: the first hour after sunrise on any given day always belongs to that day's own ruling planet, and stepping through the twenty four hours of one day and into the next in that fixed order is the documented mechanism that generates the entire seven day sequence, not an arbitrary assignment of one planet per day chosen independently.
An entry keeps this shared planetary week distinct from the separate religious significance a specific day carries within an individual tradition, the Sabbath, Friday prayer or the Christian day of worship among them, recording both the planetary naming history and the tradition's own religious observance without conflating the two.