"Ọdún Tuntun Ayọ" (pronounced oh-doon toon-toon ah-yo)
Breakdown:
* Ọdún (oh-doon) - Year
* Tuntun (toon-toon) - New
* Ayọ (ah-yo) - Joy, happiness
You can also use:
* "Ọdún Tuntun" (oh-doon toon-toon) - New Year (literally)
* "Ẹ̀yin Ayọ" (eh-yin ah-yo) - "Happy you" (formal and polite)
Important Note: Yoruba pronunciation can be tricky, especially for vowels. Try listening to a native speaker to get the intonation right.