nihtern:

Sami runic calendar.

Image source: digitalmuseum.se

“Typically fabricated from wood or reindeer antler, this calendar was used to keep track of both natural phenomena and religious occurrences. Written in the runic alphabet, the wooden calendar was a useful tool in helping to preserve the balance between Nature and religion as they denoted events in both realms.”

Text source: utexas.edu/courses/sami/dieda/anthro/concept-time.htm