Times denoted with pm occur between 12 noon and midnight.
5.35pm is thus 5.35 + 12 = 17.35 using the 24hr clock.
On a 24 hour clock, it's pm. On a twelve hour clock, it could be either.
21:00
7:40 pm military time. For anything after 12 noon just add 12 to hr. Ex: 1 pm is 1300.
13:45 (1 + 12 = 13) (12 + 12 = 24)
1430 military time is 2:30 pm civilian time. The time zone is often added; 1430 EST, PST, or whatever is appropriate. Note that military (and European) time is based on a 24-hr clock, as opposed to the civilian 12-hour clock.
It's am because it's referring to 24 hr clock.
2 PM on the 24 hour clock is 14:00.
16.30PM
On a 24 hour clock, it's pm. On a twelve hour clock, it could be either.
2 pm
16:00 is 4pm on a 24 hour clock.
2000 hrs
5+12 is 17:00 in 24 hour clock
You need to specify what 1531 is. Is it days? Or minutes or seconds. I'll take it here because it looks to be in format of 24 hr clock, this would be 3:31 pm.
4 pm is 16.00
21:00
Using the 24 hour clock system, then 1 pm is 13.00, and 2 pm is 14.00.