You can find the date of manufacture in one of the following locations.
The date and order number may also be engraved on the inside sleeve of a cylindrical lock and next to the deadbolt on a mortise lock.
B.A.S.I.S Offline, Wi-Q WDC, and Keypad EZ
EX units do not have the manufacture date engraved on them. The date of manufacture can only be found on the white sticker.