You will have to call Ruger.
Ruger has extensive serial number data on their website.
Ruger's website has information on serial numbers, and year of manufacture. Go to customer service, historical data.
If the Ruger website is up, it has sn data
The Ruger web site has sn data if you can get to it.
Go to the Ruger website- look under customer service- data- rifle- your model, then llok for your serial number.
Ruger website, customer service, historical data- year of production will be there by serial number.
If you find the serial number of YOUR Ruger, go to the Ruger Website. Under Customer Service you will find a link to historical data. You can look up the year of manufacture by serial number. Since you did not share with us what your serial number is, we don't have a clue.
Ruger website, under Customer Service, Historical Data, pick rifle pistol revolver or shotgun, then your model, and date of manufacture by serial number range is shown.
We cannot tell, since you did not complete the question, but the Ruger website, under Customer Service, Historical Data, has the date of manufacture for different serial number ranges.
The Ruger website, under customer service, historical data, lists year of manufacture.
Check the Ruger website. If the sn function is up, you can find out.