student asking question

When can I use the expression "big day"?

teacher

Native speaker’s answer

Rebecca

"Big day" is an expression used to indicate that something important or significant will be happening that day. This can refer to both positive or negative things. Ex: It's a big day for me today. I'll be taking my university entrance exams. Ex: It'll be a big day tomorrow, so go to sleep early and get some rest.

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