This article presents Gdansk calendars by the mathematician Johann Gottlieb Bartoldi (1736–1788), which were published from 1776 until 1789. The almanacs were entitled: “Neuer und Alter Kunst- und Tugend-Calender”, “Neuer und Alter Haus- und Geschichts-Calender” and “Allgemeiner Landwirtschafts-Calender”. This text highlights those aspects which depict the traditionalism and conservatism of the calendars, originating from the beginning of the eighteenth century.