// Workers AI · dad joke modeWhat did Haab' calendar say? It had a date.

"Haab" redirects here. For the airport designated by ICAO code HAAB, see Bole International Airport. For the medieval Hungarian prelate, see Haab (bishop of Vác).

Today (at UTC+00)
Friday, 25 September 2026
Maya	13.0.13.17.6 19 Chen, 12 Cimi
Other calendars Akan Monofie Armenian 7 Sahmi 1476 Aztec Tititl 18, 12 Miquiztli Babylonian 12 Ululu, 2337 SE Balinese pawukon Menga, Kajeng, Menala, Keliwon, Maulu, Sukra of Bala, Yama, Dadi, Sri Bengali 10 Ashshin, BS 1433 Chinese Yang Water Tiger・Ox Mansion Fire Horse Year, Month 8, Day 15 (Qiufen, 13 days until Hanlu) Common Era 25 September 2026 CE Coptic 15 Thout, AM 1743 Egyptian 12 Mechir, 2775 NE Ethiopian 15 Maskaram, 2019 Amätä Məhrät French Republican Décade I, Tridi de Vendémiaire de l'Année 235 de la République Gregorian 25 September, AD 2026 Hebrew 14 Tishrei, AM 5787 Hindu Śatabhiṣaj・Śūla Solar: 9 Āśvina, 1948 SE Lunisolar: Caturdaśī, Śukla pakṣa of Bhādrapada, 2083 VE Rāudra・5127 KY・1,872,843 Icelandic Föstudagur, 2 Haustmánuður 2026 Islamic 12 Rabi' al-thani, AH 1448 (using tabular method) ISO week date 2026-W39-5 Japanese 15 Hazuki, Reiwa 8 (Shūbun, 13 days until Kanro) Julian 12 September, AD 2026 (AM 7534) Julian day 2461309 Korean 15 Dakdal, 4359 DE Roman Pridie Idus Septembres, MMDCCLXXIX AUC Solar Hijri 3 Mehr, SH 1405 Tibetan 14 khrums, me pho rta 2153 or 1772 or 1000
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The Haabʼ (Mayan pronunciation: [haːɓ]) is part of the Maya calendric system. It was a 365-day calendar used by many of the pre-Columbian cultures of Mesoamerica.

Description

Haabʼ months: names in glyphs in sequence

No. Seq.	Name of month	Glyph examples	glyph meaning	No. Seq.	Name of month	Glyph examples	glyph meaning
1	Pop		mat	10	Yax		green storm
2	Woʼ		black conjunction	11	Sakʼ		white storm
3	Sip		red conjunction	12	Keh		red storm
4	Sotzʼ		bat	13	Mak		enclosed
5	Sek		death	14	Kʼankʼin		yellow sun
6	Xul		dog	15	Muwan		owl
7	Yaxkʼin		new sun	16	Pax		planting time
8	Mol		water	17	Kʼayabʼ		turtle
9	Chʼen		black storm	18	Kumkʼu		granary
				19	Wayebʼ		five unlucky days

The Haabʼ comprises eighteen months of twenty days each, plus an additional period of five days ("nameless days") at the end of the year known as Wayeb' (or Uayeb in 16th-century orthography).

Bricker (1982) estimates that the Haabʼ was first used around 500 BCE with a starting point of the winter solstice.

The Haabʼ month names are most commonly referred to by their names in colonial-era Yucatec (Yukatek). In sequence, these (in the revised orthography) are as seen on the right: Each day in the Haabʼ calendar was identified by a day number within the month followed by the name of the month. Day numbers began with a glyph translated as the "seating of" a named month, which is usually regarded as day 0 of that month, although a minority treat it as day 20 of the month preceding the named month. In the latter case, the seating of Pop is day 5 of Wayebʼ. For the majority, the first day of the year was Seating Pop. This was followed by 1 Pop, 2 Pop ... 19 Pop, Seating Wo, 1 Wo and so on.

Inscriptions on The Temple of the Cross at Palenque shows clearly that the Maya were aware of the true length of the year, even though they did not employ the use of leap days in their system of calculations generally. J. Eric Thompson wrote that the Maya knew of the drift between the Haabʼ and the solar year and that they made "calculations as to the rate at which the error accumulated, but these were merely noted as corrections they were not used to change the calendar."

Five unlucky days

The five nameless days at the end of the calendar, called Wayebʼ, was thought to be a dangerous time. Foster (2002) writes "During Wayeb, portals between the mortal realm and the Underworld dissolved. No boundaries prevented the ill-intending deities from causing disasters." To ward off these evil spirits, the Mayans had customs and rituals they practised during Wayebʼ. For example, the Mayans would not leave their homes and wash their hair.

References

• Bricker, Victoria (1982). "The Origin of the Maya Solar Calendar". Current Anthropology. 23 (1): 101–103. doi:10.1086/202782.
• Coe, Michael D. (1992). Breaking the Maya Code. London: Thames and Hudson. ISBN 0-500-05061-9.
• Foster, Lynn V. (2002). Handbook to Life in the Ancient Mayan World. New York: Facts on File.
• Kettunen, Harri; Christophe Helmke (2005). Introduction to Maya Hieroglyphs: 10th European Maya Conference Workshop Handbook (pdf). Leiden: Wayeb and Leiden University. Retrieved 2006-06-08.