Time

Time and dating conventions in the legendarium is very simple. There are three eras: In writing, BI always comes after the year (324 BI) whereas FY and IY always come before the year in a date. BI also works backwards, approaching zero, whereas the other two eras work forward, going away from zero.
 * BI: The era prior to the founding of the Resarian Imperium
 * IY: The era of the Resarian Imperium (lasts until IY 527)
 * FY: The era after the Resarian Imperium fell

A year on Astarnia consists of 365 days, and twelve months. The months of January, February, April, June, August, October and December have 30 days. The remaining five have 31. A week is 7 days, a day is 24 hours, an hour 60 minutes and a minute 60 seconds. Winter typically falls in the northern hemisphere from December to March, Spring is March to June. Summer is June to September and Autumn is September to December. In the southern hemisphere, this is reversed.

After the spread of the Resarian Imperium, April 1st is considered new years day in most cultures.