How to Identify the Date on Car Glass?
3 Answers
Here are the methods to identify the date on car glass: 1. The numbers with black dots on the glass indicate the production year and month. The numbers represent the year, which can be determined based on the vehicle's manufacturing date. The black dots represent the month. If the dots are in front of the number, subtract the number of dots from 7; if they are behind the number, subtract from 13 to get the month. 2. Some glass may also have a few thick black dots after the production year and month, which indicate the specific week of the month. Below is an extended introduction to car glass: 1. In addition to the production date, car glass codes also identify the car manufacturer, glass brand, national certification codes, etc. 2. Car glass is an essential part of the vehicle's body accessories, primarily serving a protective function. 3. There are mainly three types of car glass: laminated glass, tempered glass, and zone-tempered glass, all of which can withstand strong impacts. 4. Car glass can be categorized by its location into four types: windshield, side window glass, rear windshield, and sunroof glass.
When inspecting car glass, I noticed that the date is usually marked in a small corner, and you can tell the year and month by the dots and numbers. The standard rule is that the number represents the last digit of the year, and the dots represent the month. For example, the number '2' plus six dots means it was produced in June 2022. Different manufacturers may have slight variations in their coding—dots before the number indicate the month comes first, while dots after mean the month comes after. I once checked my own windshield and found '1.' with several dots on the driver's side, indicating January 2021. Knowing this is important, such as when buying a used car to check if the glass has been recently replaced. It's simple and practical—just spend two minutes crouching down for a closer look to learn. Regular checks help avoid safety hazards.
I learned from the car forum that identifying the glass date is actually quite easy. The first step is to find a bright spot and look at the engravings on the edge of the window. Generally, there is a combination code at the lower corner of the windshield. It's common to see a number for the year plus dots for the month, like dots and numbers representing April 2025. But pay attention to the details: the meaning can change depending on the position of the numbers. I've handled this a few times—once, I helped my neighbor discover his glass was five years old, and he replaced it immediately to ensure driving safety. Give it a try, and you'll master it. Don't overlook this skill—it’s very helpful in daily life.
