Most people know about the planetary days of the week (i.e. Saturn-day, Sun-day, Moon-day), but did you know the planetary nights are actually separate?
Even when most of the world adopted a (fairly arbitrary) Gregorian calendar 16 c., it’s quite remarkable how the Chaldean planetary order of days and hours still remain intact until today. The system we still use today was developed by Chaldean mages, breaking the hours into two cycles of 12, in order of the planet’s orbital velocity in relation to the earth.
Note that each planetary day does not actually start at midnight. Each planetary day starts in the hour of sunrise and each planetary night begins in the 13th hour, usually falling around sunset. For example, tomorrow’s day of the Sun does not begin until 6:14 AM! Also note that the Chaldean planetary order of hours differ slightly differ from the planetary order of days, but they do relate very closely by way of calculations.
An Interesting Note About the Planetary Day Names
The origin of the English names we use are actually Teutonic/Germanic versions of the names of Greek and Latin gods. Ancient Indian sages also named their days of the week in the same Chaldean order, renamed to fit Vedic deities. Alexandrian Christians in the 4th c. actually removed the god names and replaced them with just the numerical order #1-7. This is still used in Arabic, which was an influence to the languages of other Islamic and neighboring regions including Urdu, Farsi, Turkish, Kurdish, Indonesian, Amharic, and many others. For example in Arabic, Sunday literally translates to يوم الأحد Day one, Monday translates to Day 2 يوم الاثنين , etc. the exceptions being Friday= الجمعة Day of Gathering (which is the Muslim holy day, sabbath, if you will), and Saturday= السبت Day of rest.
Thankfully, nowadays we no longer have to calculate hours and dates by hand and we don’t even need to reference a chart like below. Like most things in modern times, there’s most definitely an app for this! Most planetary or astrological phone apps have a planetary hour section you might want to look for if you have one installed. For just pure planetary hours these are a couple useful options for a quick reference Iphone ($0.99) and Android (free).