How can you find out what part of the night is the 3rd part (using time)?

Question

How can you find out what part of the night is the 3rd part (using time)?

Answer 1

Night. Midnight. Twilight.

I don't know, it just sounded cool.

Answer 2

i will say that it's from 12 a.m. to 3 a.m.,if the night starts at 6 p.m and last 12 hours,so i'd said that's it.

Answer 3

I imagine you would divide the number of hours by three, and the third part would start after 2/3 of those hours have elapsed.

That's my guess anyway.  

Answer 4

easy, two ways even

one sun set to sun rise

count the total number of hours

and divide them by three

count back from the time of sunrise the number arived at prior

and this is begining of the 3rd part

or a bit philosophicly

the twiligh the darkenss and the early rise of the sun

judge by the light