When was the original Super Mario Bros. game released for Nintendo in the U.S.?

Unknown

It’s difficult to pinpoint exactly when Nintendo released Super Mario Bros. in the United States. In 2014, the company celebrated the 30th anniversary of its release date in Japan, which means it would have had to be released in the U.S. sometime around 1985. Some speculate that the company released it alongside the launch of the Nintendo Entertainment System on October 18, 1985, but no one is certain! Source: The Verge, Gamasutra