A maturity date that does not follow standard market conventions. It relates to operations of currency or deposits in foreign markets. The practice is that maturity dates are either spot or fixed dates. Odd dates are any dates randomly fixed. So for a contract that has a two-month maturity and begins on April 20th, it would mature on June 20th. Any day different, June 21th, June 19th, etc. would be an odd date. Also called broken date.