Nope. When they built G3s destined for militaries, they would stamp a lot of the parts that way, but not HK94s.
If you go to the HKPro home page, on "World of HK", then Special Topics, there's one about markings on HK firearms. It shows common locations for date codes.
On a 94, you will find them on the receiver, barrel, bolt head, bolt carrier, and sometimes the plastic furniture parts. But even if they don't match, it doesn't mean anything. Even factory built parts can have date codes from different years, since the codes are when the parts were made and not when the gun was assembled.