Evening: 6-9 p.m. Late at night: Midnight-6 a.m. Toward morning: 3-6 a.m.

Is 4pm evening or afternoon?

In the USA, 4pm is considered afternoon. But it could be thought of as "evening" elsewhere.

Is 5pm evening or afternoon?

12:01 p.m. – 5:59 p.m. is afternoon. 6:00 p.m.- 11:59 p.m. is evening.