note that this is when the serial# was applied to the receiver not when the carbine was complete.
When it was assembled is what would matter more, IMO, and that's not known. Unless you wanted a specific date to coincide with your birthday or other significant date, getting the date it was stamped doesn't seem very revealing or important. The month of stamping, yes.
My sig: Consider adding IP/S'G's to my registry. I've found 3 sets of consecutives & WILL immediately inform you of one if you won't cut my throat like someone else did, I do it to help us both. https://grandrapids.wufoo.com/forms/zzlnt0519k86xs/