[General] Is You have a nice day, too correctly used in my sentence?

[Zoli]

Hello, a friend thanked me for doing him a favor and wished me a great day. I'm wondering if my reply to him is proper:

"It was the least I could do. You have a nice day, too!"

I'm not sure about the last part "You have a nice day, too!" is it proper? or should I use "Have a nice day, too" instead? Is that comma before the word "too" necessary?
Thanks.

 

[Charlie Bernstein]

Hello. A friend thanked me for doing him a favor and wished me a great day. I'm wondering if my reply to him is proper:

"It was the least I could do. You have a nice day, too!"

Yes, it's exactly right.

I'm not sure about the last part "You have a nice day, too!" is it proper?

Yes.

Or should I use "Have a nice day, too" instead?

No. The You is necessary to make clear that you're responding to his thank-you.

Is that comma before the word "too" necessary?

Yes, it is in American English. Without the comma, it looks like an unfinished sentence: You have a nice day too wonderful for words.

Thanks.

The British use fewer commas than Americans. When the meaning is absolutely clear without a comma, they often leave it out. So I'll let one of them tell you what they would do.

 

[jutfrank]

The British use fewer commas than Americans. When the meaning is absolutely clear without a comma, they often leave it out. So I'll let one of them tell you what they would do.

I would use a comma, too.