Question: 언제
Answer: 2018-02-04; 2018 2월 04; 02/04/2018; 02 04 2018; 04/02/2018; 2018 february, 04; 2018-02-04; 04 02 2018; 02-04-2018; 2018 02 04; 04 2월 2018; 04-02-2018; 2018; 2018