Have a bless day in Arabic?

There isn't a direct translation for "Have a blessed day" in Arabic that conveys the same exact meaning. However, here are some options you can use depending on the context and level of formality:

Formal:

* يُسعد يومك (Yusa'id yawmaka): This literally translates to "May your day be happy," and it's a polite way to wish someone a good day.

* أُمنّيَك بِيوْم مُبارَك (Umunniyaka bi yawm mubārak): This means "I hope you have a blessed day." It's a more religious and formal greeting.

Informal:

* بِالتوفيق (Biltūfīq): This means "Good luck," and it's a common way to wish someone well.

* يوم سعيد (Yawm Sa'īd): This means "Happy day," and it's a more casual way to wish someone a good day.

Adding a religious element:

* أسأل الله أن يُبارِكَ يومك (As'al Allah an yubārik yawmaka): This means "I ask God to bless your day." This is a very sincere and religious greeting.

The best option will depend on your relationship with the person and the context of the situation.