Capital letters: overview
1. names of days and months
2. titles followed by a proper name and titles referring to one person
3. names of institutions
4. names of religions, their adherents and adjectives derived from them
5. certain abbreviations and acronyms
6. names of holidays and special days
7. words in titles of books, films, poems, newspapers, television channels, songs (except for small words like 'a', 'the')
8. the personal pronoun I
9. proper names (people, languages, brands, countries, nationalities, buildings, places, ...)
10. historical events and eras
11. the first word in a sentence
12. the beginning of a quotation if the quotation is a complete sentence