How do you describe the patterns of sunrise and sunset times for the equator?

The sun rises in a nearly vertical direction at all times of the year within the tropics, and there is no more than an hour after sunset before astronomical darkness sets in - a really fast nightfall indeed.

The sun is also very high in the sky at all times of the year near the equator (except when rising and setting).

There are approximately twelve hours of daylight and darkness all year round in tropical regions.