System for adjusting the position of a first toothed wheel set relative to a support on which the first toothed wheel set is pivotably mounted and timepiece comprising such a system

A large date calendar display mechanism driven via a kinematic chain by a horological movement of a timepiece equipped with said large date calendar display mechanism, said large date calendar display mechanism comprising:

• a first date indicator on which the indications of the units component of the date from “0” to “9” are placed, and a second date indicator on which the indications of the tens component of the date from “0” to “3” are placed, whereby all of the date indications from “01” to “31” can be obtained by combining the indications of the units component “0” to “9” of the date, borne by the first date indicator, with the indications of the tens component “0” to “3” of the date, borne by the second date indicator, the first date indicator remaining still during a 24-hour period separating the passage from the last day of a month having 31 days to the first day of the following month, the kinematic chain comprising a wheel that is continuously engaged with the horological movement and which has a perimeter provided with a toothing via which the wheel meshes with a pinion which itself contributes to driving the first indicator of the units component of the date, the wheel being, at one point along the perimeter thereof, devoid of teeth such that, during the 24-hour period separating the passage from the last day of a month having 31 days to the end of the first day of the following month, the wheel does not mesh with the pinion which, similarly to the first date indicator, thus remains still, the large date calendar display mechanism further comprising a units drive pinion engaged with an intermediate wheel, the units drive pinion being frictionally mounted on a units drive wheel with which it forms a units drive wheel set, an adjusting member, the angular position whereof is adjustable and which is engaged with the units drive pinion, being borne by the units drive wheel.