A ZIP+4 code uses the basic 02119 Zip code plus four additional digits to identify a geographic segment within the five-digit delivery area, such as a Roxbury city block, a group of apartments, an individual high-volume receiver of mail or any other unit that could use an extra identifier to aid in efficient mail sorting and delivery in Massachusetts.
A proper noun is different from a pronoun. Days of the week are always capitalized and are proper nouns. Names of cities and names of people are proper nouns. Pronouns are words like he, she, it, you, yours. Yes, the days of the week are proper nouns and always capitalized. Pronouns are a class of words used to refer to other specific nouns. The most common English pronouns include he, she, it, me, I, us, we, you, they and them. If you capitalize it in the middle of a sentence, it's (generally) a proper noun.
1 How Common Nouns Can Become Proper Nouns.  2 A proper noun and a common noun often combine to form the complete name of somethingâ Allegheny River, Bellevue Hospital âand in such formations, both the proper noun and the common noun are capitalized.ontrast with proper noun. As a general rule, a common noun does not begin with a capital letter unless it appears at the start of a sentence. Common nouns can be subdivided into count nouns and mass nouns. Semantically, common nouns can be classified as abstract nouns and concrete nouns.