The Egyptian calendar
The year the Egyptians invented is still in use — in the church and in the fields.
Two calendars, not one
“The ancient Egyptian calendar” and “the Coptic calendar” are not two names for the same thing. They are the same year in every structural detail, separated by one leap day every four years — and that single day has now pushed them almost a season apart.
Words here you may not know — press any of them: CopticThe last stage of the Egyptian language, written in Greek letters plus seven signs kept from demotic. Spoken in Egypt for centuries after the conquest, and still the language of the Egyptian church's liturgy. · The days overThe five extra days after the twelve months, which bring the year to 365. The Egyptians counted them as falling outside the year, and said the gods were born on them. · DynastyA line of kings from one house. The division into 31 dynasties comes from Manetho, an Egyptian priest writing in Greek in the third century BCE, and scholars still use it.
The fixed year · one leap day every four years
The Coptic calendar
7 Paopi
بابه
Year 1743 of the Martyrs
Month 2 of Akhet — Inundation — the Nile floods the land
- Counted from
- 1 Thoth of year 1 = 29 August 284 CE, the start of the Era of the Martyrs, still the reckoning of the Egyptian church.
- Its current year began
- September 11, 2026
This is the living one. The Egyptian church sets its feasts by it, and Egyptian farmers still work by its month names — Thout, Meshir, Parmouti.
The wandering year · 365 days, no leap day
The ancient Egyptian calendar
4 Paremhat
برمهات
Year 2775 of the Era of Nabonassar
Month 3 of Peret — Emergence — the land appears and is sown
- Counted from
- 1 Thoth of year 1 = 26 February 747 BCE. This is the base Ptolemy used for his tables in the Almagest, and it has been the astronomers’ reckoning for the Egyptian year ever since.
- Its current year began
- April 17, 2026
A caveat: the ancient Egyptians had no continuous count of years at all. They dated by the regnal year of the reigning king — “year 5 of Ramesses II” — and began again at every accession. The year number above is a modern computational convention, not something an Egyptian scribe would have written. It is here because “counted from when?” needs an answer.
The gap between the two dates today
218 days
The entire difference comes from one leap day. The wandering year loses a quarter-day against the sun every year, so its New Year falls one day earlier every four and works its way round the whole year every 1,460. The Alexandrian reform of 25 BCE added the leap day, which pinned the Coptic calendar to the sun while the older one kept walking.
A year built on the Nile, not the sun
Most calendars are built on the sun or the moon. The Egyptians built theirs on the river. They divided it into three equal seasons of four months each, every month exactly thirty days — 360 days, with five spare days to finish the year. For a country whose entire life was set by when the flood arrived, that division makes complete sense.
The three seasons
Akhet is the inundation, when the Nile covers the land and lays down its silt. Peret is the emergence, when the water falls back, the land appears and is sown. Shemu is the harvest, when the water is low and the crop is gathered. Not summer, winter and autumn — these seasons describe the land and the water, not the temperature.
The ancient date can be computed — it just does not tell you where the year is
The ancient Egyptian year was exactly 365 days with no leap day, and the solar year is about a quarter-day longer, so it slipped a day every four years and worked its way round the seasons completely every 1,460. A date in it is therefore perfectly computable — it is computed above — but it tells you nothing about where you are in the real year: the month of Tobi fell in winter in one era and in summer in another. So when an inscription reads “day 20 of the second month of Akhet”, working out what season that actually was means knowing the century first.
But the year itself never stopped
The Coptic calendar is the same structure exactly — the same months in the same order — with the leap day added, which stops the slippage. It is in use today in the Egyptian church and in farming: Egyptian farmers still say Thout, Meshir and Parmouti, and know what each month is for. The Coptic date in the card above is calculated in that calendar, and it is the one that still matches where the real year is.
The whole year
Both have the same shape: three seasons, twelve months of thirty days, then five days over. The table below describes both at once.
Akhet
Inundation — the Nile floods the land
- 1Thoutتوت
Folk saying: «Thout tells the heat: die.»
- 2Paopiبابه
Folk saying: «Paopi: come in and shut the gate — the cold is coming.»
- 3Hathorهاتور
Folk saying: «Hathor, father of scattered gold — the wheat is sown.»
- 4Koiakكيهك
Folk saying: «Koiak: your morning is your evening — the shortest days.»
Peret
Emergence — the land appears and is sown
- 5Tobiطوبة
Folk saying: «Tobi's cold bends even the young.»
- 6Meshirأمشير
Folk saying: «Meshir, father of many gales.»
- 7Paremhatبرمهات
Folk saying: «Paremhat: go to the field and bring the crop home.»
- 8Parmoutiبرمودة
Folk saying: «Parmouti: thresh the grain with the pole.»
Shemu
Harvest — low water and the gathering in
- 9Pashonsبشنس
Folk saying: «Pashons sweeps the fields bare — the harvest is in.»
- 10Paoniبؤونة
Folk saying: «Paoni: the cursed heat grows.»
- 11Epipأبيب
Folk saying: «Epip: the grapes ripen.»
- 12Mesoriمسرى
Folk saying: «Mesori: even the stubborn canal runs — the flood.»
After the twelve months come five extra days (six in a leap year). The Egyptians treated them as falling outside the year altogether, and said the gods were born on them.