1. nundinal - Noun
2. nundinal - Adjective
A nundinal letter.
Alt. of Nundinary
Source: Webster's dictionaryCombining these with what is known about how the calendar worked, especially the nundinal cycle, an accurate conversion of Roman dates after 58 BC relative to the start of the Julian calendar can be performed. Source: Internet
For a while, the week and the nundinal cycle coexisted, but by the time the week was officially adopted by Constantine in AD 321, the nundinal cycle had fallen out of use. Source: Internet
This may indicate that a single nundinal letter was assigned to both halves of the 48-hour bissextile day by this time, so that the Regifugium and the market day might fall on the same date but on different days. Source: Internet
Because the nundinal cycle was absolutely fixed at eight days under the Republic, information about the dates of market days is one of the most important tools used for working out the Julian equivalent of a Roman date in the pre-Julian calendar. Source: Internet
In any case, the 8-day nundinal cycle began to be displaced by the 7-day week in the first century AD, and dominical letters began to appear alongside nundinal letters in the fasti. Source: Internet
Since the length of the year was not a multiple of eight days, the letter for the market day (known as a "nundinal letter") changed every year. Source: Internet