You add -st to numbers written in figures and ending in 1–but not 11–in order to form ordinal numbers.
...Sunday 1st August 1993.
...the 101st Airborne Division.
SUFFIX
You add -st to numbers written in figures and ending in 1–but not 11–in order to form ordinal numbers.
...Sunday 1st August 1993.
...the 101st Airborne Division.
SUFFIX
Collins COBUILD Advanced Learner's English Dictionary. Английский словарь Коллинз COBUILD для изучающих язык на продвинутом уровне. 2006