Pinpointing the day from Ice Cube's "Today Was A Good Day"

There were definitely pagers in the 80s.

Actually and the 70s and the 60s and the 50s, but they were certainly widely available by the late 80s.

It's interesting because one of the lines is "Hope I live another twenty-fo" implying that he's 24 years old; however the song was released when Ice Cube was only 23.