Frontier - The Calendar
One of the inevitabilities of colonizing alien planets is that any given planet is significantly unlikely to have rotational and revolutionary periods that coincide with the orthodox years and days. Eiluphates Gamma - that is, Federal Frontier Colony 1079 - is no exception to this, although its periods are much closer to the Federal measurements than some other colonies.
The Federal calendar was made up of twelve months of thirty days each, for a total of 360 days per year. A day was exactly 24 hours, an hour was exactly 60 minutes, and a minute was exactly 60 seconds. (The second was defined by properties of certain radioactive elements, which are beyond the scope of this document; suffice it to say that the reader may assume that the Federal second was roughly the same as that with which he is familiar.)
By contrast, FFC1079's year is, using Federal units, 356 days, 6 hours, 43 minutes, and 12 seconds long; by its own units, it is exactly 372 days long. The colonists used the Federal system to determine their hours, minutes, and seconds, so each day has 24 hours, each hour 60 minutes, and each minute 60 seconds; the 12 months, however, are 31 days each. Unlike the Federal system, whose official measurements were in multiples of the second, the Frontier system uses fractions of the year - such that a day is officially 1/372 of the year, an hour is 1/8928 of the year, and so on. (It is an interesting bit of trivia that by chance, the difference between the orthodox year and the FFC1079 year as measured in orthodox days - 3.72 days - is exactly 1/100 of the FFC1079 year as measured in local days.)
A side effect of this difference is that the Frontier hour is slightly shorter than its Federal counterpart; one Federal hour is 1.044 local hours, or 1 hour, 2 minutes, and a little under 39 seconds. (A Federal second is likewise 1.033 local seconds.) As a rule, people on FFC1079 use local time measurements; however, the Federal supply ships ran on orthodox time, and anyone who interacted with the ships needed to keep the differential in mind. Because of this, most people on FFC1079 used digital calendars and clocks that display both orthodox and local measures, although these have recently fallen out of favor - largely because without the supply ships, the clock manufacturers have had no reliable way to synchronize their clocks with the orthodox time.
One important detail of FFC1079's calendar is that it begins on the winter solstice; this is done for largely traditional reasons. It also starts with the year that Dodge and his colonists arrived on FFC1079; the winter solstice before they arrived was the first day of FFC Year 1. Because of the 3.72-day difference between the FFC1079 year and the official year, the local year goes farther out of sync with the orthodox year with every revolution. Specifically, the Federal year begins 3.88 local days earlier with each year that goes by; the two measures return to rough synchronization once every 96 years. (This first occurred in FY602/LY13.)
This can lead to confusion when discussing dates; for example, the day on which Council president Peter Marratt was inaugurated, the first day of FY614, was actually in the middle of the eleventh month of LY24. By FY625 - LY35 - the Federal year had fallen out of favor as a record-keeping tool, since those actually recording events preferred to use a dating system that was consistent with the actual years that they were experiencing. (LY35 is commonly chosen by historians as the turning point because it was during that year that the FFC Council passed a bill changing the council president's term to four local years.)