* E ʻoluʻolu e hauʻoli! (Pronounced: eh oh-loo-oo-eh how-oh-lee) - This is the most common way to say "have a good time" or "enjoy yourself."
* E ʻoluʻolu e leʻaleʻa! (Pronounced: eh oh-loo-oo-eh leh-ah-leh-ah) - This translates to "have fun."
* E hauʻoli i kou manawa! (Pronounced: eh how-oh-lee ee koh-oo mah-nah-wah) - This translates to "enjoy your time!"
You can also choose from these more informal expressions:
* Aloha nui! (Pronounced: ah-loh-hah noo-ee) - This means "much love," and can be used to wish someone well.
* Maikaʻi! (Pronounced: my-kah-ee) - This means "good" or "okay," and can be used as a general well-wishing.
The best way to express "have a great time" in Hawaiian would depend on the context and your relationship with the person you're talking to.