Always for the pronoun "I"
to begin a sentence
to Begin a direct quotation
the first word of a greeting or closing of a letter
Proper nouns
days of the week, holidays, and months of the year
the name of a language
Proper adjectives
Initialisms
Forms of address (Mr., Aunt, President when used as part of the name)
the official title of a human being when used with that person’s name
Initials in someone’s name
First and last word and important words in a title
