I cant believe that of all the internet reading, and forums, and researching watches Ive done, I never knew it was not recommended to set the date between these hours. However I just wanted to get some insight from some of the watch experts here regarding this and Tag Heuer. I assume certain movements or watches would be more prone to damage by this than others. Also I've read that they say this in the manual, but In all 3 Tags I own I have yet to find it in the manual. Ive read them multiple times to ensure proper care of my watches. Do certain tags or movements have protection from such damage? Also I read in another topic that some of the watches change date at different times now because of damage, and even watches that are not damaged change either early or late by minutes or hours. My Tag 2000 Classic Automatic is probably 6 or 7 years old, and I've never known about the correct method for setting the date and decided to wind it up and check it out today. I would have been happy if the date changed somewhere around midnight but i was surprised at what I found. After properly setting the time and date this morning I eagerly awaited midnight and for a watch that has yet to be serviced, the date chaged at exactly 12:00am. I am so happy to know that I didnt damage my watch, or at least badly since it changed on the dot. I believe it is the Calibre 5 inside, and it must be a testament to it being a good movement. Just thought I'd share my experience, and I enjoy reading the advice and comments from the expert members on the forum.