Pull out the crown and adjust it to the grid of the moon phase (it may also be in other ways, with different styles and different months); Turn the crown forward until the moon is out of sight.
Then slowly turn the crown forward to match the moon phase with the date. If you want to calculate the date here, you'd better set your watch to 1 or 15.
Don't adjust the time between 9: 00 pm and 4: 00 am, which may damage the watch and make the calendar jump wrong. In addition, when adjusting the time, the watch needs to dial clockwise, not counterclockwise, which will easily lead to the pointing deviation of the watch pointer (the minute hand should be dialed counterclockwise). It also affects the accuracy of the watch.
The design principle of the moon phase table: the moon phase function is often placed in a semi-circular window with a special shape, which includes a semi-circular arc and two small circular arcs. This carefully designed shape, combined with the moon on the lunar phase disk, can tell us more accurately the shape of the moon at the beginning or end of a cycle.
The working principle of watches, watches are precision instruments used to display time. The principle of this instrument is to use a vibration system with constant period and continuous vibration as the standard.
If we know the time (vibration period) required for a vibration system to complete a complete watch vibration and calculate the vibration times, then the time after so many vibrations is equal to the vibration period multiplied by the vibration times. That is, time = vibration period × vibration times.
1904, Louis Fran? ois Cartier, a French businessman engaged in jewelry business, received a complaint from Alberto Santos Dumont, a friend of the pilot.
It is difficult to take your pocket watch out of your pocket when flying a plane. I hope he can help solve this problem so that you can see the time during the flight. So Cartier came up with a way to tie the pocket watch to his hand with a belt and buckle to solve his friend's problem. And this pocket watch tied to your hand is today's watch.