Great quote from Rich Appel's "Hz so Good" newsletter, part of a list of things jocks do wrong that warmed this chart geek's heart:
"A lot of jocks still can’t read Whitburn. To summarize: 1) The date listed is when a song entered the chart, NOT when it peaked, so it’s not “from June 1969”; 2) The “peak” is what chart position the song reached during its run, NOT what number it was for the year; and 3) “wks” refers to how many weeks the song spent on the chart, NOT how many weeks it spent at the peak shown. I still hear these mistakes made when listening to oldies stations"