Mother's Day is the second Sunday in May in America. Americans celebrate Father's Day, too. It's the third Sunday in June. In Korea, we honor our mother and father on the same day. It is Parents' Day. What day is it this year?
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1. It is Parents' Day.
2. What day is it this year?
In the passage above, I think the meaning of 'it' is different in each sentence.
In #1 'it' means an impersonal pronoun.
However in #2, 'it' refers
to 'Parent's Day', isn't it? (In this case, 'it' is a personal pronoun.) Am I right?
In the first sentence, "it" is an introductory idiom, just as "there" and "here" can be.
~It is a nice day.
~There are five cats in that house.
~Here is your breakfast.
In the second, yes, it's a pronoun referring to Parents' Day.
Yes, you are correct! In sentence #1, "it" is being used as an impersonal pronoun to refer to Parents' Day. It is a substitute for repeating the entire phrase "Parents' Day."
In sentence #2, "it" refers to the specific day that Parents' Day falls on this year. In this case, "it" functions as a personal pronoun because it is referring to a specific noun, which is Parents' Day.
So, in summary, in sentence #1 "it" is being used as an impersonal pronoun, while in sentence #2 "it" is functioning as a personal pronoun.