Nombres Ordinaux en Anglais — Utilisation dans les Dates

Les ordinaux de 1 a 31 (pour les dates)

NombreOrdinalAbregeExemple dans une date
1first1stJanuary 1st / the 1st of January
2second2ndFebruary 2nd
3third3rdMarch 3rd
4fourth4thApril 4th
5fifth5thMay 5th
11eleventh11thNovember 11th
12twelfth12thDecember 12th
20twentieth20ththe 20th of August
21twenty-first21stJanuary 21st
22twenty-second22ndFebruary 22nd
23twenty-third23rdMarch 23rd
30thirtieth30thApril 30th
31thirty-first31stDecember 31st

Regles de formation

TerminaisonSuffixe ordinalExemples
Chiffres finissant par 1-st1st, 21st, 31st
Chiffres finissant par 2-nd2nd, 22nd
Chiffres finissant par 3-rd3rd, 23rd
Tous les autres-th4th, 5th, 10th, 20th
ExceptionsFormes irregulieresfifth (5th), eighth (8th), ninth (9th), twelfth (12th)
Pour les siecles : the twentieth century (XXe siecle), the twenty-first century (XXIe siecle). Pour les millenaires : the second millennium (2e millenaire).