Telling time: I usually get up at half past eight in the morning.

[Li Chyan]

Could you review my sentences, please?
It's seven o'clock in the morning.
It's five forty-five pm.
It's half past ten in the morning.
It's half past ten am.
I usually get up at half past eight in the morning.
The bank opens at quarter to nine in the morning.

Are all of these sentences correct?When can we use am/pm?Can we say:"at half past ten am" (it sounds inadequate to me)
Thanks in advance

[Mister Micawber]

.
Are all of these sentences correct?-- Yes

When can we use am/pm?-- Virtually whenever you wish
Can we say:"at half past ten am" (it sounds inadequate to me)-- It just sounds a little unusual; I think natives use 'in the morning' here usually.
.
_________________
Native English teacher at Mister Micawber's