1-1 may refer to:

• New Year's Day, a public holiday in many countries, held annually on the first of January
• Schweizer SGP 1-1, an American glider design
• World 1-1, the first level of Nintendo's Super Mario Bros

See also

• One-to-one (disambiguation)

Topics referred to by the same term

This disambiguation page lists articles associated with the same number.
If an internal link led you here, you may wish to change the link to point directly to the intended article.