On this day in music history: April 21, 1958 - “Twilight Time” by The Platters hits #1 on the Billboard Best Sellers chart for 1 week, also topping the R&B Best Sellers chart for 3 weeks on April 28, 1958. Written by Buck Ram, Al Nevins, Morton Nevins and Artie Dunn, it is the third pop and fourth R&B chart topper for the Los Angeles, CA based vocal group. The song is originally recorded in 1944 by The Three Suns and by big band leader Les Brown. When The Platters record it in early 1958, it is initially be regulated to the B-side of “Out Of My Mind”. American Bandstand host Dick Clark prefers “Twilight” and begins heavily plugging it on the show, making it the A-side by default. Entering the Best Sellers chart at #7 on April 14, 1958, it leaps to the top of the chart the following week. The single sells over 1.5 million copies by the time it tops the charts, The success of the record is significant as more than 90% of its sales on the 7 inch 45 RPM format, leading The Platters label Mercury Records to phase out the manufacturing of the 10 inch 78 RPM record, the format that had dominated the music industry for the first half century of its existence. “Twilight Time” is certified Gold in the US by the RIAA.