This invention the date indicator of the time piece movement (24) regards the instantaneous modification mechanism which is controlled. As for the said instantaneous modification mechanism,The - first clipping section (12b) 24 hour cars which are provided (10),In order they are the - said 24 hour cars and the same axis, to turn freely, 24 hour cars (10) the date ring drive car which is installed (16) being, the pin which is settled in the aforementioned clipping section (18) with, the date indicator (24) with cooperating, everyday around 0 o'clock in the morning 1 steps each the tooth which moves the said date indicator (20) with the date ring drive car which it possesses, andThe - aforementioned pin (18) with the spring equipped shaking component which cooperates (26 and 32)It possesses. These parts, around 0 o'clock in the morning, the aforementioned spring equipped shaking component (26) escaping the aforementioned pin (18) from, suddenly, return to the stationary position, the aforementioned pin (18) with the aforementioned date ring drive car (16) throw out to the front at that time, the tooth of the said date ring drive car (20) strikes the date indicator (24), in order 1 steps to move the said date indicator, form and size are decided, in addition, are arranged.
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