capitalization: terms indicating time or sequence
Capitalize common singular nouns and abbreviations when they are followed by a date, number or letter denoting time or sequence or used for the purpose of reference:
- It’s Day 15 of the election campaign.
- The shortest route from Toronto to Montréal is along Highway 401.
- Workshop 2 – Rm. 809
- See App. A.
Some idiomatic expressions containing common nouns followed by a letter or number are also capitalized. The numbers in such expressions are often spelled out:
- Back to Square One.
- He’s on Cloud Nine.
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