1990, 1987, 1992, 1986, 1997, 1985, 1996, 1984, 2000, 2004 which are normal years and which are leap years
1992 1996 1984 2000 2004 these are leap years. Others are flat years
Here's the leap year (1990, 1988, 2100, 2000)
1988 2000
A simple method for calculating the leap year of the Gregorian calendar
1. Divisible by 4, not by 100
2. Divisible by 100 or 400