Prepare to be awed by Odd Day. For the mathematically challenged, Thursday’s date, 5/7/09, is one of only six this century that will feature three consecutive odd numbers. Numbers lovers say the rare occurrence is an excuse to celebrate.

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“The previous stretch of six dates like this started with 1/3/1905, 13 months after the Wright Brothers’ flight,” said Ron Gordon, the Redwood City teacher who enthusiastically promotes these numerical holidays, like Square Root Day on 3/3/09.
Gordon is offering a prize of $579 to those who celebrate the date with the most zeal or who get the most people involved in an Odd Celebration.
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