[<< wikibooks] Indonesian/Lessons/Time
Pukul berapa? -What time is it? (formal)
Jam berapa? - What time is it? (informal)Tepat waktu - on time.
Indonesia uses 24-hour time format, so use pukul 20 instead of 8 pm.
Because Indonesia is so large there are three time zones: West: Sumatra, Java and surroundings (Waktu Indonesia Barat ); Central: Bali and surroundings (Waktu Indonesia Tengah); and East: Papua and surroundings (Waktu Indonesia Timur ). Each zone differs from the next by 1 hour. In spoken indonesian, 12 hour format is prefer to use and adding the time indicator after it.


6.00 am = 6:00 pagi
11.00 am = 11:00 siang
6.00 pm = 6:00 sore
11.00 pm = 11:00 malam"Jam" ("lit. clock") or "at time", often added before the time (e.g "pukul 6 pagi" means at 6 am)
In written Indonesian, the 24-hour format is used.

== Minutes ==
To say minutes, first, you say "the hours" then "kurang/lebih" (lit. less/more) then "the minutes".

6.11 = enam lebih sebelas (lit. six more eleven )
11.54 = duabelas kurang enam (lit. twelve less six )use only if the minutes not more or less than 15 minutes, see below.
use the word "setengah" to say half-hour

6.30 = setengah tujuh (lit. half seven)
11.30 = setengah dua belas (lit. half twelve)
2.31 = setengah tiga lebih satu (lit. half three more one )
4.25 = setengah lima kurang lima (lit. half five less five )
6.16 = setengah tujuh kurang empat belas (lit. half seven less fourteen )