Peanuts and D-Day

As I discovered only after making a post earlier today, Charles Schulz marked D-Day in a number of Peanuts strips. So I looked them up:

1993 June 6
1994 June 5, 6, 7, 8, 9, 10
1996 June 6
1997 June 6
1998 May 31

No D-Day strip in 1999. The last new Peanuts strips appeared in January and February 2000.