It is a rather simple operation, which can nevertheless cause damage and misunderstandings if not performed correctly. In fact, the date display must never be operated during the period of time in which its gears are engaged, generally between ten o'clock in the evening and two in the morning (it is a good idea, however, to refer to what is indicated in the instruction booklet). Instead, it is preferable to carry out the date correction in the morning, to avoid having to intervene during the 'forbidden' hours. In the case of a model with rapid correction, simply pull out the crown to the correct position (usually the first), turn it until the date clicks into place, and then return it to its initial position. A useful tip is to wind the watch manually before wearing it, as the date display absorbs a certain amount of power from the power reserve in order to be able to click. When the watch is stationary, however, it must first be fully wound. Next, the hands must be turned past midnight, pulling out the crown completely, so that the date jumps one day, until it reaches a time that does not correspond to the aforementioned 'forbidden' period. Once the crown has been pushed back in one click, the date can be adjusted using the rapid correction device. If the watch is not equipped with one, simply continue turning the crown fully pulled out until the desired day. Some models, mostly vintage, are equipped with a semi-rapid correction device, by means of which, after having moved the hands up to midnight, it is then sufficient to move them back until around ten o'clock at night and advance them again to pass midnight and set the date. Once this operation has been completed, the hands of the watch will naturally have to be synchronised with the exact time signal.
