Definitions for "Haab"
A 365 day period broken into 18 twenty day periods plus a five day period.
Same as the vague solar year; period of 365 days.
One of the three Maya calendars, and the one which corresponds most closely to ours in length. The haab is also known as the "Vague Year" by archaeologists, since it is 365 days in length, or about a quarter day short of the actual solar year.