What is the normal difference in glass dates for a new car?

[MacEvangeline]

It is normal for the production dates of the windows on a new car to be inconsistent. The only exception is that the production date of the glass cannot be later than the production date of the vehicle. Below is an introduction to the production date of the glass: 1. Numbers: The number represents the production year of the glass, indicating the last digit of the year. For example, 8 means 2008. The specific production year can be determined based on the vehicle's manufacturing date. If the vehicle's manufacturing date is in 2007 or 2008, then the glass's year number 8 would be 2008, not 1998, as the difference between the glass and the vehicle's production date would not exceed 10 years. 2. Small dots: The small black dots on the glass indicate the production month. The position of these dots generally falls into two scenarios: some car models have the dots in front of the number, while others have them behind the number. If the dots are in front of the number, subtract the number of dots from 7; if the dots are behind the number, subtract the number of dots from 13. The result obtained is the production month of the glass.