오전 네시야.
ojeon nesiya
It's four o'clock in the morning.
informal
오전 다섯시야.
ojeon daseotsiya
It's five o'clock in the morning.
informal
오전 네시입니다.
ojeon nesiipnida
It's four o'clock in the morning.
formal
오전 다섯시입니다.
ojeon daseotsiipnida
It's five o'clock in the morning.
formal