The value of a watch is to know how much time you have before it gets dark so you can spend your time appropriately. Or you could just put your hand out at arm's length and count how many fingers above the horizon the sun is and multiply by 15 minutes. After the sun goes down you have about 20 minutes of light left.

I don't wear a watch. <img src="/images/graemlins/blush.gif" alt="" />