The Answer is the DOT or the date of production is the last four
digits of the DOT code. The U.S. Department of Transportation (DOT)
National Highway Traffic Safety Administration (NHTSA) necessitates that Tire
Identification Numbers be a mixture of the letters DOT, shadowed by eight to
thirteen letters one or both numbers that recognize the developed location,
tire mass and manufacturer's code, alongside with the week and year the tire
was made.
