The way to look at the year of automobile glass is: there will be a trademark on the corner of the glass, which consists of several points and a number. Numbers represent the year when automobile glass was produced. If the point on the left represents the first half of the year, the right represents the second half. By analyzing the numbers and black spots on the trademark, the production date of automobile glass can be identified. The date code of glass has only one number, which represents the last digit of the year. For example, the number 8 represents 2008. According to the factory date of the vehicle, the difference between the glass and the factory date of the vehicle will not exceed ten years. The month can be analyzed by the black dots before and after the number. The black dot in front of the number indicates the first half of the year, and the specific month can be obtained by subtracting points from 7. If the second half of the year is indicated after the number, the specific month can be obtained by subtracting points from 13, and the week of the month can be analyzed.