생일 축하합니다 - Formal (Saeng-il chuk-ha-hab-nida) [Saeng-eel chook-hah-hahm-nee-dah]
생일 축하하세요 - Informal polite (Saeng-il chuk-ha-ha-se-yo) [Saeng-eel chook-hah-hah-sseh-yoh]
생일 축하해요 - Informal (Saeng-il chuk-ha-hae-yo) [Saeng-eel chook-hah-hay-yoh]
생일 축하해 - Intimate (Saeng-il chuk-ha-hae) [Saeng-eel chook-hah-hay]