yes
If you are referring to the night of Halloween, or Halloween night, night is not capitalized. If you are referring to the movie Halloween Night, then night is capitalized as it is the name of a movie.
Yes. America is always capitalized -- even if it is being used as an adjective.
No, adjectives are never capitalized unless they are the first word of a sentence.
No, "Halloween" does not need to be capitalized unless it is at the beginning of a sentence or part of a title.
In most cases, section headings should be capitalized according to the rules of Title Case. This means that the first letter of each main word in the section title should be capitalized, while articles, coordinating conjunctions, and prepositions should typically remain lowercase. Note that some style guides may have variations on this rule.
Yes. Any time "Greek" is used as an adjective or a noun, it should be capitalized.
Yes. Halloween is a holiday, and therefore a proper noun, so just like Christmas, Easter and New Years, Halloween must too be capitalized.
Always
Halloween is capitalized because it's a proper noun. Happy is usually capitalized with it, as it often starts the greeting or sentence.
No, it is a proper noun. It can, however, function as an adjunct with other nouns: Halloween costume, Hallowen candy.
The word "Antarctic" is capitalized because it refers to a proper noun, specifically the region around the South Pole. In English grammar, proper nouns like geographic locations are typically capitalized.
Not necessarily.