(Q91345841)

English

Julian dominical cycle

cycle of 7-day weeks in a solar calendar over 28 years (Gregorian and Julian dominical cycles first matched on a secular leap year in 1200 AD, with dominical letter BA and a gap of 7 days between their dates)

  • Julian cycle
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1200
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28 year
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DL=DL[(ymod7+ymod4)×2mod7],{DL[0]='G,DL[1]='F,DL[2]='E,DL[3]='D,DL[4]='C,DL[5]='B,DL[6]='A.
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