Natural Calendar
A 13-month calendar aligned to Earth and Moon
A solar calendar of 13equal months, opening on the vernal equinox, with the moon's phase shown for every day. Time as a rhythm rather than a ledger.
How it works
13 months of 28 days
Every month is exactly four weeks. 13 × 28 = 364 days, so every date lands on the same weekday every year.
The year opens at the equinox
Aeterna, the Day Out of Time, falls on the vernal equinox. It belongs to no month and no week — it simply opens the year.
Three days of work, one of rest
The week is four days long. Rest arrives on a fixed rhythm rather than an arbitrary one.
Counted from the Holocene
Year 0 is 9,700 BCE, the start of our geological epoch — so the count encompasses all of human civilisation. Add 9,700 to any Gregorian year.
The months
Vernis · Germen · Flora · Sol · Aestus · Serere · Fructus · Messis · Autumnus · Bruma · Niveus · Glacies · Renova