May–December

Alternative forms

 * May-to-December
 * May and December

Etymology
From the lyrics to the Kurt Weill/Maxwell Anderson song "", about such a relationship, which includes the line "It's a long, long time from May to December".

Adjective

 * 1) Pertaining to a relationship in which one person is much older than the other.

Synonyms

 * May–September

Derived terms

 * May–December romance
 * May–December marriage