Qurak

DayMatchQ

Disponible

Tests whether a date matches a day-of-week specification

DayMatchQ[date, daytype]
DayMatchQ[daytype]
Length[Select[DayRange[{2000}, {2050}, "Holiday"], DayMatchQ[#, Monday]&]] / DayCount[{2000}, {2050}, "Holiday"]//N → 0.

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