win on Sunday, sell on Monday

Proverb

what wins on Sunday sells on Monday

1. (US, motor sports) A brand of automobile that performs well in racing competitions will be popular with retail purchasers.
   • Doesn't anyone remember the axiom that what wins on Sunday sells on Monday? Automotive execs may wonder whether that still applies, but you can bet they know who won before they go to bed each Sunday night.1991 July 3, Al Pearce, “General Motors likely to reduce NASCAR funds”, in Daily Press, Virginia, US, retrieved 15 Oct 2018
2. (US, broadly) Any equipment available to consumers that performs well in widely-viewed public events on weekends can be expected to receive higher retail sales subsequently.
   • There's an old saying in the golf industry: What wins on Sunday sells on Monday. Golfers are the ultimate copycats.2006 April 13, Ed Sherman, “Dual-driver bag is not for duffers”, in Chicago Tribune, retrieved 15 Oct 2018

   Synonyms:

   race on Sunday, sell on Monday