This is a shared home for the Delphi/Pythian civic calendar alongside Attic and Macedonian variants. It blends quick reference material with an approximate converter so you can label today (or any date) in those month systems without needing a full ephemeris.
Lunisolar civic calendar tied to Delphi; year starts after the summer solstice; month set here follows common epigraphic names. Intercalary month repeats Poitropios.
Classical Athenian month ordering, with the usual Poseideon II intercalation in the Metonic leap years.
Royal Macedonian ordering common in Hellenistic usage; intercalary slot modeled as a repeated Xandikos.
Typical sequence; local inscriptions vary. Intercalary month is a second Poitropios.
Year starts after midsummer; leap years add Poseideon II.
Intercalary month is modeled as a second Xandikos.
Method: anchor to a known new moon (2000-01-06 18:14 UTC), use an average synodic month (29.5306 days), start each civic year on the first new moon after the summer solstice in your timezone, and apply a simple Metonic 19-year pattern with leap years 3,6,8,11,14,17,19. Results are labels for planning/reference and will drift a bit from rigorous astronomical reckoning.