Archer seems to take place in an invented timeline: the internet is commonly used by civilians (which actually began in the mid-90's), the I.R.A. is still active (in the real world, they ceased military actions in the early 00's, and disarmed in 2005), the Russians are still Soviets (which actually formally ceased to be the case at the very end of 1991), Woodhouse is a veteran of WWI (which ended in 1918), Mother was involved in WWII, and so on. These things probably couldn't happen at the same time.
Or can they? Is it possible to determine when Archer takes place?