Sunrise and sunset most certainly are not subjective, dr_lew. Both are routinely forecast for any given locality on the planet, predicted well in advance. Data for these events have been published for centuries, and continue to be published.
It is no matter of opinion; sunrise and sunset occurs, whether you believe in such occurance or not (and you appear to be putting yourself in the odd position of disbelief). You can detect and record sunrise and sunset in numerous ways, independent of human observation.
The very words themselves describe the subjective experience. The sun and moon don’t objectively rise and set. These actions are apparent and depend on a point of view. Ancient peoples took this appearance for an objective fact, and hypothesized that after setting the sun traveled beneath the earth by various special means to reappear at its place of rising. This was a direct objectification of the subjective appearance. As moderns, we give objective accounts of the cause of these appearances, but recognize that the appearance is an illusion, just as it is an illusion that the moon “follows along” with you when you watch it from a car window, even though this can be accounted for objectively.