Decennials Calculator

Decennials are a Hellenistic time-lord technique that splits a life into equal 129 source month periods, one for each traditional planet. Valens counts each source month as 30 days, so one major contains 3,870 source days. He reconciles elapsed civil time at 365.25 days per year before locating the active ruler.

The source calls this a 10 year 9 month distribution on its 360 day clock. On a civil calendar, one major spans roughly 10 years and 7 months. The exact dates in this result come from the source conversion rather than Gregorian month addition.

Vettius Valens gives the method in the Anthology, Book VI, printed pages 117 through 120 in Mark Riley's translation. A fifth-century continuation on printed pages 168 through 170 preserves a separate lower-level method. Decennials can be compared with annual profections and zodiacal releasing.

Every planet receives an equal 3,870 source-day major period. The order changes with the natal chart because it follows the planets by zodiacal longitude from the selected apheta.

Valens starts from the appropriate well-situated luminary. When both luminaries are badly situated, the planet following the Ascendant begins the sequence. This calculator treats the operative whole sign places as the place gate. The shared Hellenistic condition ledger then checks capacity and solar visibility, including chariot mitigation. If both luminaries qualify, Valens' day or night opening instruction gives the sect luminary priority. Every result names the selected apheta and its basis.

Inside each major period, the 129 source months divide among the planets by their lesser years counted as months: Saturn 30, Moon 25, Mercury 20, Sun 19, Mars 15, Jupiter 12, Venus 8. Those add back to 129. The sub-period order starts with the major lord and continues through the same chart-specific sequence. The major lord sets the broader period. The sub-lord identifies the active interval inside it.

The lower level has two named source branches. Valens divides the active monthly period once by the lesser-year proportions. The fifth-century continuation expands its month frames with intercalary days and repeats a 129 day planetary sequence. Because those inserted days move later boundaries, the result shows the active major, monthly, and lower-level ruler separately for each source clock. Gregorian inputs use a declared civil bridge for the sixth intercalary day: a completed source year receives it when its common frame reaches or crosses February 29.

Read the major lord as the ruler of the longer chapter and the monthly lord as the ruler working inside it now. Return to the natal chart for the condition of both planets. Their houses show the topics they govern, while sect and dignity describe how readily each planet can carry its work.

Their natal relationship shows how the two agendas cooperate. Reception or a close supportive configuration can help the monthly lord carry the major lord's topics. A difficult configuration can call for more deliberate choices. This describes a quality of time you can plan around rather than a fixed event.

Use periods you have already lived as a calibration check. Compare the major rulers with the chapters of your life, then inspect the monthly handovers around specific changes. Your history shows how each natal planet tends to operate when it becomes a time lord.

Decennials describe a long major period. They are one layer in a time-lord stack and read best beside the other active rulers.

The closest neighbor is firdaria. Both assign long planetary rulerships. Firdaria uses unequal periods in a fixed sect-based order, while decennial majors are equal and follow the natal zodiacal order from the selected apheta. The Time Lord Calculator stacks your active rulers from several systems side by side, and zodiacal releasing starts from the Lot of Spirit for the longer narrative layer.

Yes. The calculator establishes horizon sect and the exact Ascendant, then judges each planet's operative whole sign place. Near sunrise or sunset, a small time error can change sect or move a placement across the horizon. That can change the starting basis and every period that follows.

Birth time also fixes the Moon's longitude. The Moon moves about 13 degrees a day, so an uncertain time can shift its place in the chart-specific order. If you do not have a verified time, a birth time rectification pass can help. You can also compare past period dates with your own history before relying on future timing.