Decennials, Firmicus Maternus Online Calculator, (Planetary Decades) Timing method from Mathesis Astrology Planetary Periods

Decennials Calculator
(Planetary Decades)

Traditional time-lord method

This method divides the life into 7 different periods, each lasting 10 years and 9 months. Each of these is governed by one of the 7 planets.
  • The first period starts with the sect light, Sun for diurnal charts, Moon for nocturnal.
  • Following periods/time-lords continue by the next planets after the sect light, going in zodiacal order.
  • Each period is divided into 7 sub-periods. The first sub-period belongs to the same planet as the entire decade. The order of the sub-periods is determined in the same way as the main periods.
  • Optional:
  • Start from Sect Light, Apheta or any other planet
  • Calendar (1 year ~ 360 or 365.25 days)
  • L3 & L4 sub-periods

Decennials (Planetary Decades) - Online Calculator

Date of Birth
Time (local time)
h min
Start from:
Cycle
Calendar to use
L3 & L4:
Current planets
Sun
Aries
5°06’
Ari
 
Moon
Aquarius
11°54’
Aqu
 
Third Quarter Moon (306°47’)
Mercury
Aries
3°48’
Ari
R
Venus
Aries
1°06’
Ari
R
Mars
Cancer
21°37’
Can
 
Jupiter
Gemini
15°01’
Gem
 
Saturn
Pisces
23°42’
Pis
 
Uranus
Taurus
24°28’
Tau
 
Neptune
Pisces
29°48’
Pis
 
Pluto
Aquarius
3°26’
Aqu
 
Node (M)
Pisces
27°04’
Pis
R
Node (T)
Pisces
27°23’
Pis
 
Lilith (M)
Libra
29°50’
Lib
 
Chiron
Aries
21°55’
Ari
 
Calculate when planet
enters next Signs: