30. Marriage Anniversary Riddle A famous restaurant starts a special marriage anniversary promo to the couples on Thursdays who carry their proof of marriage...50% discount on meals only on Thursdays. A couple enters the restaurant on Thursday, tells the manager that they got married on a fine Sunday 28 years back hearing this the manager chased away the couple without being served. Why? Added 20 November 2009 · Updated 9 July 2026 Show Solution Solution: Because their story was impossible. If it was their 28th wedding anniversary on that Thursday, then the wedding date 28 years earlier could not have been a Sunday. A date 28 years later usually falls on the same weekday, because 28 years contains 28 normal weekday shifts plus 7 leap-day shifts: 28 + 7 = 35 days, and 35 is divisible by 7. So Sunday would again be Sunday, not Thursday. Even in edge cases with century leap-year rules, it would shift only to Saturday or Monday, not Thursday. So the manager concluded their marriage proof or story was fake.
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