User blog:SiPlus/Modern Warfare date

When I watched Call of Duty 4 Mod Tools files I randomly opened All Ghillied Up localization script, I saw a string:

REFERENCE          DATE LANG_ENGLISH       "1995"

What's that? True date of CoD4-15 or date from old storyline? The date is printed in old intro style (TITLE, which is "Zones of Exclusion" is INTRO_1 now and PLACE is INTRO_2).