It is Military slang. It is usually used to refer to any time when the sun isn't up, usually between mid-night and 4 am or so. Most operations start at Oh dark thirty, much earlier than a normal 'person' would think civilized.
[New]
0-Dark-30 is 30 minutes before sunrise.
-Edit-
0-dark-30 refers to a time (any time really) where the sun isn't up, but you are(and you're probably working). It doesn't mean military, but generally this is when Military members have a lot of work, so it applies well to them.
It is Military slang. It is usually used to refer to any time when the sun isn't up, usually between mid-night and 4 am or so. Most operations start at Oh dark thirty, much earlier than a normal 'person' would think civilized. [New] 0-Dark-30 is 30 minutes before sunrise. -Edit- 0-dark-30 refers to a time (any time really) where the sun isn't up, but you are(and you're probably working). It doesn't mean military, but generally this is when Military members have a lot of work, so it applies well to them.
The ISBN of Dark Back of Time is 0-8112-1570-9.
7:30
around 6 30
It gets dark at 6:30 pm
just about 6:30
Around about 19:00 to 19:30 .
after dark usually at 7:30
around 9:30 pm (2130)
Its debated but its about 0 A.D - 30 A.D
Sun sets at 6:10, it gets dark around 6:30-6:45pm
The ISBN of Dark Demon is 0-515-14088-0.