a rationalist's guide to a precisely arbitrary countdown
Gould, Stephen Jay
1997
A series of essays in which the author shares his interest and insights into the coming millenium, focusing on questions of calendrics, astronomy, and history.
humanity's epic struggle to determine a true and accurate year
Duncan, David Ewing
1999
Leads the reader on an extraordinary journey through man's reckoning of time, from the earliest calendars throught our struggles with the digital "millennium bug.".
Family and Neighbors: Who are our families and neighbors? -- 1. Our families - Amusement Park - Map and globe skills Use addresses. 2. Families together - Moving the sheep - Citizenship points of view - How does your family celebrate? 3. Our school - Chart and graph skills - Calendar 4. Our neighbors - People Jane Addams 5. America is special - around the world Australia.
Introduces the concept of the day, in simple text with illustrations, and includes information how many days are in week, month, and year, and explains the different times of day: morning, afternoon, and night.
Provides a general introduction to calendars, examining their uses, history, and reforms; describes several calendars, both ancient and modern, that have been used throughout the world; explores the mathematics of calendars; and discusses the history of Easter and the difficulties the Christian Church had setting its date.