If the birthdate of your instrument remains a mystery, Godin’s customer support team is notoriously helpful. You can email their support desk with high-resolution photos of the front of the guitar, the back of the headstock, and the serial number, and their team can manually look up the build sheets in their historic archives. If you would like to decode a specific instrument, tell me: The exact serial number digits The brand name on the headstock (Godin, Seagull, etc.) Whether it is an electric, acoustic, or nylon-string model

For these instruments, there is no reliable online chart to determine the exact date. Your best course of action is to contact Godin's customer service directly with your serial number. They have historical records and can provide you with the exact date of manufacture.