When they start the 18th hole of the last round, the sun is just starting to set (over the Atlantic Ocean, no less). When they get to their tee shots to hit their second shots, it is already pitch black. This could only be a matter of couple of minutes to walk to their next shot. And, yet, at the very end when Will Smith hears the roar of the final shot, he's walking along the beach into the setting sun?
This book and subsequent movie is loosely based on the Bhagavad Gita. Arjuna (R. Junuh) is counseled by Krishna, one of the most beloved deities in the Hindu pantheon.