1. A calendar that has been maintained, kept intact, or conserved in its original or historical form
The museum displays a preserved calendar from the 18th century.
O museu exibe um calendário preservado do século XVIII.
2. A calendar system or record that has been protected from damage, loss, or alteration
The ancient Mayan preserved calendar fascinates archaeologists.
O calendário preservado dos antigos maias fascina os arqueólogos.