Capitalize "Old" and "Roman" in the phrase "the Old Roman calendar."
When you are referring to the organization, yes.
The phrase "Columbus Day" is the full name of a holiday. Therefore, both words should be capitalized.
Acronyms are always capitalized to distinguish them from ordinary words in the sentence, this is most important when the acronym is a word (IE WHO- World Health Organization as opposed to 'who'). You do not capitalize the individual words when spelling out the phrase UNLESS it is a proper noun. World Health Organization is capitalized, certified public accountant is not, United Nations is, unidentified flying object is not.
no.
I would capitalize all of them. Catch Me If You Can.
In most quotations you should capitalize the first word and the other words necessary; as in any other regular sentence. There is no need to capitalize most words just because they are in quotations.
Yes, when referring to a specific list of Spelling Words, you should capitalize the term.
50 meters in an olympic swimming pool
The way you capitalize other words. If it's at the beginning of a sentence it should be capitalized. If it's not then it shouldn't be capitalized.
Words like a, an, and, or.. You should always capitalize "the" in any part of the title such as, The Dog That Killed The Unicorn. Or something.
never