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VizThink
VizThink Conference
0801 VizThink08 Wiki
Nancy Duarte
LATCH: Location, Alphabets, Time, Categories, Hierarchies
Time
Ancient Calendars
Gregorian Calendar (1582)
How Easter changed the Calendar
Attachments
How Easter changed the Calendar - YouTube
Parents
Easter
Gregorian Calendar (1582)
Julian Calendar (45 BC)
The History Guy