Calendar for the single year of 1765. The calendar is made from a disc of bronze, which has tarnished. The calendar has a hole at the edge and another near the edge. On one side of the calendar is a table with the months in three letter abbreviations and a table with the numbers for the number of days. Around the edge of the table are inscriptions religious dates including Easter and Advent. The other side has a table relating to phases of the moon for each month. Around the table are dates including a term date and the King's birthday.