Among their seven appearances on Billboard‘s Hot 100 chart, Simply Red reached number one twice. Exactly 30 years ago, the second of those two chart-topping songs, a remake of Harold Melvin and the Blue Notes’ “If You Don’t Know Me By Now,” climbed to number one for one week. To commemorate that anniversary, “If You Don’t Know Me By Now” by Simply Red is today’s Daily Eighties Flashback.