Rules are made to be broken. Remember the “golden hours” rule? You know, the one that states that any good landscape image has to be taken during those golden hours right around sunrise and sunset? Well, in black and white photography you can break that rule with impunity! (I’m sure this comment will get me flamed)
Black and white photography is all about contrast. Any subject and any lighting that will provide you with great contrast is fair game. And if you don’t believe me, read Ansel Adams’ classic book Natural Light Photography to see how the world’s most famous photographer used contrast in his images taken at all times of the day and night, not just during the “golden hours”.