Abstract
Dates with same-digits (1/1/11, 2/2/22, etc.) offer the rare opportunity to study people's reactions to the conspicuousness of repetition. Anecdotal evidence suggests that such dates are considered special and preferably selected for celebrations of various kinds. This note compares the number of civil ceremonies at Zurich, Switzerland, on four different dates. On both 7/7/77 (a Thursday) and 8/8/88 (a Monday) there were significantly more ceremonies than on two respective control dates which contain two differing digits (Monday, 8/8/77 and Thursday, 7/7/88). Suggestions for prospective research on September 9, 1999 are given.
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