Brand: Realistic
The year realistically depicted in "31-1987" is 1987. The format of the date follows the standard convention where the month (January = 1, February = 2, etc.) is represented by a number from 1 to 12, the day (1st, 2nd, 3rd, etc.) is represented by a number from 1 to 31 or 30 or 28 (depending on whether it's a leap year), and the year (AD or CE) is represented by four numerals. Combining and rearranging these elements yields the date representation used in "31-1987."