Capitalization 

The following are the cases and situations in which we capitalize a word 

 The first letter of the first word of all sentences

     Are you coming here? Ask me your questions 

 Proper nouns and the common nouns used with them

     Persian Gulf - Benjamin Franklin - Alvand Mountain - Lake Erie - the President

     Hafiz Street - Malāyer - Paris - Iran - Ivory Coast - Ghana - Sinā Ahmadvand

 The first letter of any word referring to God

     Allah - Him - His dignity - Thy - The Almighty - Heavenly Father - Jehovah  

 The name of holy books

     Quran (sometimes Koran) - Bible - Book of Psalms - The Scriptures - Gospels 

 The name of religions and religious groups

     Moslem - Roman Catholicism - Episcopalian - Unitarian - Epicurean

   Protestantism  

 The names of days and months

     Sunday - Monday - January - February - Farvardin - Ābān  

 The name of schools and universities and the nouns used with them

     Shariati High School - Oxford University - Payam-e-Noor University 

 The name of historical eras and events

     Norooz - Civil War - Stone Age - Renaissance - Valentine Day 

 The name of races, organizations, and their members

     Aryan - Eskimo - University Club - Boy Scout - Samurai  

 Commercial names

     Mahrām - Pepsi Cola - Zam Zam - Panasonic - Samsung 

 In poems all the verses start with capital letters whether they are complete sentences or not

     How do I

     Love thee? Let me say

     How beautiful you are! Sun-like you shine 

 Important words of the title of articles, books, films, etc

     Look, Laugh, Learn - Anthony and Cleopatra - Let's Write English - Ghost Rider