From Warhammer 40k - Lexicanum
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05:02, 14 October 2025
==Quarantined content==
{{Quarantine Start}}Each increment of the year fraction corresponds to approximately eight hours and forty-five minutes Terran standard.<!-- 1 year = 8,742 hours -->
====How to determine the Year Fraction on Terra====
Rather than dividing the year into approximately 365 days like we do, the Imperium divides the year into 1000 fractions. So, "549" indicates the 549th part of 1000 parts of the year.{{Fn|1}}
To calculate this, first you need to find on which day of the year your event occurred. Using July 18th of 2005 as an example, you then determine the Julian date, which is the 200th day of 2005. Next we need to split it into hours. We do that by multiplying 200 by 24 then add the hour of the day the event occurred. If the event took place at 4pm (the 16th hour) the formula to find the Determined Hour would be:{{Fn|1}}
<br> 200 x 24 + 16 = 4816 Determined Hour{{Fn|1}}
To convert that to an Imperial Fraction, multiply your Determined Hour above by the Makr Constant: 0.11407955.
<br> 4816 x 0.11407955 = 549.41. Always round this number down to determine the closest Year Fraction that occurred before the event. So the Year Fraction would be 549.{{Fn|1}}
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wow speaking of which, this could easily be misunderstood :D the title..