ORDINALS
Capitalize:
1. Sessions of Congress, dynasties, names of regiments, etc.: e.g., the Fifty-fourth Congress, the Sixteenth Dynasty, the Forty-fourth Massachusetts.
IN GENERAL
Capitalize:
1. The first word of a sentence and the first word of each line of poetry.
2. The words I and O.
3. The first word after a colon when introducing a sentence having an independent meaning: e.g., My explanation is: Competition forces each manufacturer to study economies.
4. Words having special meanings: e.g., the Referee’s decision, a Bachelor’s degree.
5. The first word of every direct quotation.