Kostenlose Online-Wörterbücher: Übersetzungen auf Englisch, Spanisch, Französisch, Italienisch, Chinesisch, Russisch, Definitionen, Synonyme etc.
-th  
You add -th to numbers written in figures and ending in 4, 5, 6, 7, 8, 9, 10, 11, 12, or 13 in order to form ordinal numbers. These numbers are pronounced as if they were written as words. For example, 7th is pronounced the same as `seventh', and 5th is pronounced the same as `fifth'.  suffix 
...Thursday, 10th May, 1990.