Is your mother a common or proper noun?

Answer 1

Your mother is a common noun. A common noun becomes a proper noun when it is the name of a person, place thing, or a title; for example:

Dear Mother,

Mother Theresa

Mother Wore Tights (1947)

Mother's Rolled Oats

Answer 2

Yes, Mother's Day is a proper noun because it is the name for a specific day.

Answer 3

Yes they are and should be, as a sign of respect. However, used in general terms they need not be capitalized.