The Works:
Calendars, Chronology, Astronomy (including class notes), Puzzles, Atomic Number Memory Pegs, Chess games, and more.
Who is John P. Pratt?
An astronomer and computer programmer, specializing in ancient calendars.
My Family Picture, My Family's Home Pages, and Genealogy.
What's New?
Look here first for the latest!
You can e-mail me: jp at johnpratt dot com (use symbols for "at" and "dot").