and in the library:
529.309 DUNCAN Calendar : humanity's epic struggle to determine a true and accurate year / David Ewing Duncan
529.3 STEEL Marking time : the epic quest to invent the perfect calendar / Duncan Steel
R 394.26 CHASES Chase's calendar of events (Great book, we get each year's new edition.)
R 529.3 KELLY Religious holidays and calendars : an encyclopaedic handbook / by Aidan Kelly, Peter Dresser, and Linda M. Ross
Did you enter 06 in the year field of all the checks in your current checkbook?