The Imperial Calendar was established at the creation of the Third Imperium as a universal calendar reform. Dates count from the founding of the Imperium, the year “zero ” Dates before zero are negative, dates after are positive. For example, Terra discovered jump drive in -2431. The Imperium was founded in zero.
The year is divided into 365 standard days, which are grouped into 52 weeks of seven days each. The year can also be divided by 12 months of 28 days(4 weeks), but are generally not used for dating purposes. The lengths of days and weeks is a legacy of Terran domination during the second Imperium. Days are numbered consecutively, beginning with one. The first day of the year is a holiday and is not part of any week. For example, the first day (Holiday) of the year 1116 is 001-1116. The last day of the year is 365-1116.
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