Take a look through the "hole" at the center of your guitar. In it you will find a sticker with the guitar's serial number, the date it was manufactured, where it was made and its model number. You may find a few other bits of pertinent information as well. Good Luck!
The serial number contains the date of manufacture. First two digits are the year, second two are month, third two are day, and then the last is the number of the guitar that was produced on that day. The serial number should be inside the guitar and you should be able to see it through the sound hole.