fiscal calendar

Visitors to Muir Woods can see the dates of redwood tree rings.Visitors to Muir Woods can see the dates of redwood tree rings.

2013: Exploring the calendar year, fiscal year, and tree-ring year

on

What is it about the annual cycle that resonates deep within us? Long before most of the world began using the Gregorian calendar as the civil calendar (first decreed by Pope Gregory XIII in 1582), humans used other calendars to …