noun
happy event; occasion for congratulations
Refers to celebratory occasions, especially weddings, pregnancies, and births. Often used in a warm, slightly informal tone.
ご結婚おめでとうございます。本当におめでたですね。
Congratulations on your marriage. It's truly a happy event.
彼女の妊娠は家族にとって大きなおめでただった。
Her pregnancy was a big happy event for the family.