Its actually a very interesting subject – setting a false time when you know the real time, and yet for many people, it works!
There must be a pschychological reason why. Is it like when you know the time cos you just looked, and someone asks you the time, you just gotta check your watch again before answering!!!
I remember the Kaminitzer Mashgiach, Rav Moshe Aron Stern zatzal, noting that while he always sees clocks in every beis hamedrash, he rarely sees one in a yeshiva dining room! His point was that there are times when you need a clock, and times that you dont eg cos you’re enjoying yourself so time has less meaning.
Any other thoughts on this?