How do you write I hope a great day in mandarin?

There are a few ways to say "I hope you have a great day" in Mandarin, depending on the formality and context:

Formal:

* 祝您今天过得愉快 (zhù nín jīntiān guò de yúkuài): This literally translates to "I wish you a happy day." This is the most formal way to express this sentiment.

Informal:

* 希望你今天过得开心 (xīwàng nǐ jīntiān guò de kāixīn): This translates to "I hope you have a happy day." This is a more informal way to express this sentiment.

* 祝你今天一切顺利 (zhù nǐ jīntiān yīqiè shùnlì): This translates to "I wish you a smooth day." This is a common way to say "I hope you have a good day" in Mandarin.

You can also use the following phrases depending on the situation:

* 工作顺利 (gōngzuò shùnlì): This means "smooth work" and can be used if you're wishing someone a good day at work.

* 玩得开心 (wán de kāixīn): This means "have fun" and can be used if you're wishing someone a good day out.

Remember to use the appropriate tone and expression for the person you're speaking to.