How should date code be interpreted?

Date code is usually defined in datasheet. Taking an example below for LWB5, SSYYWWD = Date Code (SS=Manufacturer, YY=Year, WW=Week, D=Day)

     P/N             Date Code
    450-0169    0218365  

Refer to section 30, Device Markings, in https://www.ezurio.com/documentation/datasheet-sterling-lwb5