Most human colonies use a variation of the Aotearoan Planetary Calender, which begins with the colonisation of the planet. Since Aotearoa’s year is 388 days long, four Aoteroan years correlate to roughly five of the archaic Terran Calendar.
Each year of the Aotearoan calendar is counted as a Foundation Year with 1 FY being equivalent to 2276 CE. Pre-Foundation years are measured using Terran years as a base. For example, the period 2175-2275 CE is the First Century Pre-Foundation, consisting of Pre-F year 100 through 1. As with the Gregorian Calendar, there is no year zero.
The months of the Aotearoan calendar are, in order, Rangini, Papatuary, Muapili, Tumatau, Tanea, Matrir, Pungary, and Ronga. Every third year is a leap year, with the extra day being added to Matrir.