Meanings of ordinal numbers in English

It depends on whether you assess this by year or by ordinal numbers.

When are ordinal numbers capitalized?

The numbers to which this rule applies are the cardinal and the ordinal numbers from twenty-one and twenty-first to ninety-nine and ninety-ninth inclusive.

Second, the motorised generation has failed to distinguish between ordinal numbers (by which years are designated) and cardinal numbers (which turn up in car odometers).

Ordinal numbers used to designate numbered political divisions, sessions of Congress, names of regiments, Egyptian dynasties, and the like.