Mayan Numerology
The Maya built the most sophisticated calendar system in the ancient world. The Tzolkin — a 260-day sacred calendar interlocking 20 day signs with 13 tones — was the heartbeat of Mesoamerican civilization for over two millennia.
Vigesimal Converter
The Maya used a base-20 (vigesimal) number system — one of only a few cultures to independently invent the concept of zero. Enter any number to see it in Mayan notation.
How to Read It
The Maya counted in twenties, not tens — using just three symbols: a shell for zero, a dot for one, and a bar for five. Numbers stack vertically, and each level upward is worth twenty times the one below it.
0 × 200= 0
Place value 1
Decimal 0 written in Mayan base-20. Read top to bottom: each row is a place-value, and its position multiplies it by a power of twenty (1, 20, 400, 8,000…), just as our digits use powers of ten.
How the Mayan calendar calculator works
The calculator needs only your date of birth. It turns that date into a count of days from the starting point of the Maya Long Count, using the GMT correlation (Julian Day 584283), the figure most scholars accept. Under that correlation, 21 December 2012 falls on 13.0.0.0.0, 4 Ajaw 3 K'ank'in. This is the traditional count that Maya day-keepers, called aj q'ij in K'iche', still keep in the Guatemalan highlands. It is not the modern Dreamspell system associated with José Argüelles, which uses a different reckoning and often gives a different sign.
Everything else follows from that count. The Tzolk'in result pairs a number from 1 to 13 with one of 20 day signs; the page adds the sign's direction, colour and element. The Haab' result gives a day and month in the 365-day year. Days run from 0 to 19, because the first day of each month is its seating. The Long Count writes the total in five places: bak'tun, k'atun, tun, winal and k'in. The Lord of the Night is one of nine figures that rotate day by day. The page gives them Central Mexican names, as it does the trecena patron; the Classic Maya names are not securely known, and scholars number them G1 to G9. There is also a position counter out of 260, an optional compatibility score for a second birthday, and a converter that writes any number in base 20.
Take 14 March 1990, which falls 8,318 days before 21 December 2012. Its Long Count is 12.18.16.16.2. Its Tzolk'in day is 6 Ik', the wind sign, placed in the north with white and air. In the Haab' it is 0 Kumk'u, the seating of the last full month before the five Wayeb days. You can check the sign by hand: count back 8,318 days from 4 Ajaw and the number drops eleven places to 6 while the sign drops eighteen places to Ik'.
Read the day sign and number together as one name. The sign is the image to reflect on, and the number suggests its pace or emphasis. The Haab' date places you in the solar year, while the Long Count works more like a timestamp than a personal trait. Treat the Lord of the Night as a quiet background note. A compatibility result is best used to start a conversation, not to settle one.
The calculator can show you where your birthday sits in a calendar with a long and living history, but it cannot predict events or define your character, and it does not replace the guidance of a trained day-keeper.
This result is the numerology tradition's symbolic interpretation — an invitation to reflect, not a scientific prediction or a fact about you.
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