i think.
No, "holiday" should not be capitalized in this sentence. Capitalize the first word in the sentence and proper nouns, but not common nouns like "holiday."
You may capitalize the word "holiday" if it is the first word in a sentence; such as "Holidays are a time of celebration." You can also capitalize it if it's the title of something, or; however unlikely it may be, if it's someone's name. Examples for these would be a story entitled "My Holiday in Tokyo", or "My dog's name is Holiday." When expressed as a greeting, "Happy Holidays" is capitalized.
You do not capitalize chickenpox in a sentence. The exception is if the word is the first in the sentence.
No, you do not capitalize "first birthday" in a sentence.
You only capitalize 'deceased' if it is at the start of a sentence.
If you are writing something with a title, you would capitalize Happy Holiday Season in the title. If you are writing it in something other than a title, you would not capitalize it.
Yes, you should capitalize the letter after a comma in a sentence.
Yes, you should capitalize the word after a comma in a sentence.
Yes, you always capitalize a day of the week.
No but the Chinese New Year should be capitalized. It should be ---- the Chinese New Year is a happy holiday.
You should not capitalize a sentence fragment following a colon.
Yes, you should capitalize the first letter after a comma in a sentence.