I was flying an operation out of a US Naval Air Station and scheduled to land at something like 02:00. Called the tower when 15 minutes out and got no reply, fortunately ops was manned and they had to get the duty ATC staff to open the tower and switch on the airfield lighting. Fortunately I had plenty of holding fuel. ATC had actually forgotten that we were airborne - much apologising from a very embarrassed USN Commander.