monumenta.ch > Hieronymus > uwbM.p.th.f.69.99 > bnf7877.96 > sectio 6 > csg871.119 > sectio 16 > bavPal.lat.1449.165 > bkeCod.15.31v > bavPal.lat.1449.179 > sectio 108 > habCod.Guelf.707Helmst..28 > sectio 27 > sectio 211 > csg250.211 > sectio 127 > csg250.262 > bnf13013.132 > sectio 148 > bkeCod.15.14r > bavPal.lat.1449.77 > csg251.57 > 35 > sectio 32 > sectio 30 > csg250.248 > bnf13013.108

Beda Venerabilis Beda Venerabilis, De Temporum Ratione, 22, 18
Si enim vis scire, verbi gratia, anno quo Calendae Ianuariae quinta feria celebrantur, octavo Calendarum Octobrium die quota feria sit, dicito: October in Calendas CCLXXIIII; tolle VIII Calendas Octobres, remanent CCLXVI; adde quintam feriam quae fuit in Calendis Ianuariis, fiunt CCLXXI; partire per VII, septies triceni ducenti decus, septies octoni quinquagies sexies, remanent V; quinta est feria octavo Calendas Octobres.

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