Chase's Calendar of Events was started in 1957 as a humble 32-page booklet by  William D. Chase, an Ann Arbor man. The world's greatest datebook has been in publication ever since. It is the authoritative guide to special occurrences, holidays, anniversaries, celebrity birthdays, religious observances, sporting events, and more.  Mr. Chase will observe a special day of his own on April 8 when he turns 90.