Timepiece having a day / night display taking into account seasonal variations.

摘要

The timepiece comprises a watch movement, a calendar mechanism (223, 225) and means for indicating the sunrise and sunset taking into account seasonal variations (215). The simple calendar calendar mechanism includes a date display (223) and a month display (225). The means for indicating the sunrise and sunset also include an annual cam (211) having a profile representative of the inclination of the sun with respect to the equatorial plane and arranged to be rotated from the hours motive (207). ) via a kinematic chain (218) passing through the means to display the month and having a transmission ratio of 1/744 th.