2:45—two forty-five a.m
2:30—two thirty a.m.
2:15—two fifteen a.m.
3:30—three thirty a.m.
3:15—three fifteen a.m.
3:45—three forty-five a.m.
3:00—three a.m.

1)2:15 - it's a quarter past two p.m.
2)2:30-it's half past two p.m.
3)2:45-it's a quarter to three p.m.
4)3:00-it's  three o'clock p.m.
5)3:15-it's a quarter past three p.m.
6)3:30-it's half past three p.m.
7)3:45-it's a quarter to four p.m.