My Rolex GMT Master works perfectly while I am wearing it but when I leave it on the night stand each night it usualy runs down and stops working after five or seven hours.

SOURCE: Rolex runs down

Unfortunately, it actually may be true that the watch is functioning properly.
A self-winding watch that keeps running down can be an early symptom of Parkinson's disease.
Read item 4 "Frozen in Time", at this link, for details:
http://www.dls.ym.edu.tw/neuroscience/news41.html

SOURCE: Rolex watch stops only when I wear it

Kristy,
Stress won't affect your watch's timekeeping ability, but position will. When you lay the watch down at night, in which position is it? Also, during the day, is your arm in a static position for long periods of time? A Rolex chronometer (like the Datejust) should run approx. 36 hours after being fully wound -- without any movement. If the watch stops dead, then there is a problem with the movement and/or rotor. If it losses time, I'd bet on a static position problem. Let me know the answers to those questions and I'll try to help you get to the bottom of the problem.

Arturs Kalnins

• 2338 Answers
• Posted on Dec 17, 2008

SOURCE: i want to adjust the steel bracelet on my new GMT II

You can do it yourself but proper watchmakers screwdriver is needed.
Check the sides of your bracelet and you will see screw ends with grooves. Unscrew them and adjust your bracelet (take the links out). Then screw them back in.

Regards

Arthur

SOURCE: Rolex GMT Master II date changing after midnight

If it still under warranty take it back to rolex, other wise take it to an indpendent watchmaker they should be able to fix it for a small fee. The watch probably doesnt need a service yet if it is new.

SOURCE: how to change time and date in Rolex GMT + Master

Hi rajbhaduri. There's a complete guide to mastering these amazing watches at http://www.koniaris.com/rolex/
Enjoy! Cheers; Eagle58