View Full Version : 40k date system

The Marshel
27-01-2010, 13:23
Just confused on how the time lines work. The two in the marine codex have for the most part dates marked with 3 numbers, but the last 3 dates In both timelines provided are labled with 6

27-01-2010, 13:30
172.M41 Would be the 172nd year of the forty first millennium.

298172.M41 Would be the same year, but a specific date within it (not sure how years are split up from memory. The 5th ed rulebook explains the dating system)

27-01-2010, 15:09

This should help clear things up a bit (or complicate them, if we factor in the 7 digit format)

28-01-2010, 03:41
You can find another good explanation here (http://www.scholaprogenium.com/calendar.html)

28-01-2010, 06:26
Or, if one does not trust links:

number one: accuracy of date (optional, mostly omitted in recent publications)
first set of three numerals: the date, expressed as thousandths of a year (IE, 001 for january 1st, etc.)
second set of three numerals: the year in the millenium
finally, the milennium: M+the number of the millenium.

So, my birthdate is 0 282 978 M02 (13.4.1978, on Terra)

and the end of 40K is 0 999 999 M41 (31.december 40999, on Terra)

28-01-2010, 11:58
Also, the 1/1000 of the year roughly corresponds to 8 hours, which makes it very useful when managing work shifts, phases in Hives etc: 8 hours work, 8 hours sleep, and... 8 hours work again.

28-01-2010, 22:33
Page 126/127 of the 40k rulebook gives a pretty good explanation of the Imperial date system.