Happy Mother's Day!
Did you know Japan also has a Mother's Day? It is called 母の日 (haha no hi), which, er, literally means, "Mother's Day."
It is held on the second Sunday in May.
Here are a few vocabulary words associated with Mom.
While Japanese don't really say "Happy Mother's Day!" you can express your appreciation in other ways:
いつもありがとう itsumo arigatou--thank you for everything
感謝している kansha shiteiru--(I) am thankful.