Integer expression that indicates a year. All values between 0 and 99 are interpreted as the years 1900-1999. For years that fall outside this range, you must enter all four digits.
整数表达式，表示年份。1900-1999 之间的年份可以用 0 到 99 之间相应的数值表示，而对于超出此范围的年份，必须输入完整的四位数字。