A: What's the date today?
B: It's the 17th of August. What was the date yesterday? What will be the date tomorrow?
A: It was the 16th of August. It will be the 18th of August.
pm: between 12 noon and 12 midnight
am: between 12 midnight and 12 noon
1:15 a quarter past one / one fifteen
1:30 half past one / one thirty