"Sultans of Swing" is a song by British rock band Dire Straits from their eponymous debut album, which band frontman Mark Knopfler wrote and composed. Although it was first released in 1978, it was its 1979 re-release that caused it to become a hit in both the UK and U.S.
Sultans of Swing was the biggest hit of 1980
The song was released in 78, and became a hit in 79. My statement said it was the biggest hit of 1980 which isn't provided in the context so it should be incorrect, it was difficult for the system because it was only a year after it became a hit.