Wprowadzenie kalendarza gregoriańskiego w Rzeczpospolitej szlacheckiej
Introduction of the Gregorian calendar in the Noble Commonwealth of Poland–Lithuania

Summary/Abstract: 1. Introduction. 2. Time of introducing the reform. 3. Legal grounds for introducing the new calendar. 4. The material and territorial range of operation of the calendar. 5. Exceptions in using the new method of counting time. 6. Conclusions.

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