1995 Nissan Truck how to set the time

Engine Mechanical problem
1995 Nissan Truck 4 cyl Two Wheel Drive Automatic

My husband has a 95 nissan truck and he is having to replace the timing chain and we need to know how to set the time I have read the haynes manual so many times and it doesnt tell me anything about how to set the time ( i could be looking in the wrong place) but i can not find the instructions on how to set the time could you please help me.....
thanks