My son is 8 months old and I am at the end. The night time crying must end permanently. How do I make it so that he knows when the sun is in the sky, playtime is on and when it is dark you are not to be heard at all under any circumstance?

Establishing a bedtime routine really helps! This gives your baby enough time to wind down. Be consistent about it. Try not to play with the baby at night so the wind down process begins earlier than the actual routine. Here's a helpful article: http://sg.theasianparent.com/establishing-a-bedtime-routine/