Henry Hanke Calendar. It is one of many examples of leap week calendars, calendars that maintain synchronization. Steve hanke and dick henry, professors at johns hopkins university, tout their calendar as very close to perfect, and argued that the current system is costing us time and.
Steve hanke and dick henry, professors at johns hopkins university, tout their calendar as very close to perfect, and argued that the current system is costing us time and. It is one of many examples of leap week calendars, calendars that maintain synchronization.