The ordinal numbers from 1 to 1000 are these:
- 1 первый
- 2 второй
- 3 третий
- 4 четвертый
- 5 пятый
- 6 шестой
- 7 седьмой
- 8 восьмой
- 9 девятый
- 100 сотый
- 1000 тысячный
Like in the Interslavic explanation, these function grammatically like adjectives and decline accordingly.
To state the time of day, you typically use the preposition в or на followed by the ordinal number in the Prepositional case and the word часу́ (Prepositional case of "час").
- Example: 8:45 -> в восьмо́м часу́ со́рок пять мину́т - at eight forty-five (literally 'in the eighth hour').