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 A224940 Non-leap years beginning and ending on Tuesday. 0
 1585, 1591, 1602, 1613, 1619, 1630, 1641, 1647, 1658, 1669, 1675, 1686, 1697, 1709, 1715, 1726, 1737, 1743, 1754, 1765, 1771, 1782, 1793, 1799, 1805, 1811, 1822, 1833, 1839, 1850, 1861, 1867, 1878, 1889, 1895, 1901, 1907, 1918, 1929, 1935, 1946, 1957, 1963, 1974, 1985, 1991 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Gregorian calendar repeats after every 400 years because number of days in 400 years is 146097 which is a multiple of 7. Non-century years are leap years if and only if they are multiples of 4 while century years are leap years if and only if they are multiples of 400. 44 occurrences in 400 years. Months having Friday the 13th: September and December. 365 day ordinary year: 52 Sundays, 52 Mondays, 53 Tuesdays, 52 Wednesdays, 52 Thursdays, 52 Fridays, 52 Saturdays. LINKS Time and Date, The Gregorian calendar Time and Date, 2013 Wikipedia, Gregorian calendar MATHEMATICA Select[Range[1583, 2600], DayOfWeek[{#, 1, 1}, Calendar -> Gregorian] == Tuesday && DaysBetween[{#, 1, 1}, {# + 1, 1, 1}, Calendar -> Gregorian] == 365 &, 50] (* T. D. Noe, Apr 22 2013 *) CROSSREFS Sequence in context: A159211 A235844 A277766 * A224941 A213116 A224942 Adjacent sequences:  A224937 A224938 A224939 * A224941 A224942 A224943 KEYWORD nonn AUTHOR Aswini Vaidyanathan, Apr 21 2013 STATUS approved

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Last modified April 22 06:48 EDT 2021. Contains 343161 sequences. (Running on oeis4.)