Definition of "31st" [31st]

• Coming next after the thirtieth in position (adjective)

WordNet. Princeton University. 2010.

• "Of course, December 31st is another joyful occasion in Vallarta."
• "Analysts say the first round on October 31st is likely to be a tight contest between the three lead candidates - Ouattara, Bedie and current President Laurent Gbagbo."
• "The balance due to us up to Dec 31st is £228.15.11 and the books then on hand amount at the regular trade price to £488.7.8 but it is much to be doubted if the 'Mayday' and"