![]() ![]() How? By setting the date at the right time! What’s the best time to change date on automatic watch? So before setting the date manually on your watch, you want to make sure that the date change mechanism is completely disengaged. (And that is if you’re lucky enough to have a watch that is serviceable – not all are.) But if you do this repeatedly, you will eventually break the date change mechanism and will have to send your watch for a repair. You could set the date at the wrong time maybe once or twice without harming the movement. As a matter of fact, another system will drive the date wheel forward when you set it manually.ĭoing so, you could damage the mechanism that automatically changes the date and day of the watch around midnight. ![]() So if you use the quick date set system during those hours, you will apply a force to those gears that the watch is not supposed to handle. And some watches with a standard date and day change mechanism are still engaged up until around 3:00 AM. Remember the date change mechanism a bit earlier? They all engage to accumulate power and torque beginning around 9:00 PM. The reason why you could damage the movement by changing the date between 9:00 PM and 3:00 AM is simple. Why changing the date between 9:00 PM and 3:00 AM is bad for your watch movement The goal here is for you to understand the general mechanics of this system. You can find this mechanism in every affordable watch.īy the way, pretty much the same mechanism apply for the day wheel, if your watch happens to have one. Of course, this is not an in-depth explanation of how the date change mechanism work.Īlso, not every watch has the same movement, and the way the movement accumulates power and makes the date wheel move forward might be a little different. This happens over the course of a few hours. Standard date change: a small prong or claw on a wheel grabs that date wheel and push it forward to the next date.This power is then released when the power in this spring becomes bigger than the power of the spring-loaded date click. Semi-instantaneous date change: the power is gathered in a spring that is mounted on a wheel.You can find this in pretty much every high-end watches. ![]() This, in turn, will push the date indicator forward one day so quickly that you can’t see it moving with your naked eye. When your watch approaches midnight (within seconds of it, actually), the power in the cam is released suddenly.
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