Learn important aspects of time and its measurement from our own Heather Olsen.  She will discuss conversion from the Julian to the Gregorian calendar, changes in when the new year began, the ecclesiastic calendar, the agricultural calendar, the French revolutionary calendar, Quaker dates, quarter days, moving days, the medieval system of hours of variable length, and the system of recording time in ships' logs.

 

Join us in peron in our library for this last meeting of our program year.