Based on the level of respect or formality, you can say "What time is it?" in Korean in 3 ways:

• Informal: myeot si-ya? (몇 시야?), myeot si-ni? (몇 시니?)
• Formal: myeot si-yeyo? (몇 시예요?), myeot si-pnigga? (몇 십니까?)
• Very Formal: myeot si-pnigga? (몇 십니까?)