The Federation year is 365 days long. It is divided into 12 months of 3 tendays each, plus five intercalary days.
Years are dated according to the Holocene Epoch, where AD 2488 = 12,488 H.
New Year's Day (intercalary)
Hoister Day (intercalary)
Levine Day (intercalary)
Tenny Day (intercalary)
Federation Day (intercalary)