There should be a date on the neck and a date on the body. If those two dates match up, thats probably the exact date your guitar was built. If they dont, it could indicate that the guitars neck was replaced at some point, or that the guitar was built from spare parts and is not an original build.

How do I look up my guitar?

Guitar builders affix their guitars with names so people know what they are playing. The most common place to find identification is on the headstock or on a label inside of the guitar, if applicable. If there is nothing on your guitar in question, chances are the original label or logo has fallen off.