A student who is an idol fan made a mistake on Kakao Talk

(1)Math teacher
(2)Can you send me the test date
(3)1206 AM
(4)1209 in the morning
(5)I don’t think this is a test date
(6)1216 a.m
(7)Oh, I sent it wrongㅠㅠ I’m sorry
(8)1219 a.m
(9)Plan to implement one test in the second semester of 2023