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=OR(WEEKDAY(A2,2)=6,WEEKDAY(A2,2)=7)Edit the grid or formula, then run it through a real spreadsheet engine — no signup.
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Yes: =WEEKDAY(A2)>5 uses the default return type where Saturday=7 and Sunday=1. Unfortunately Sunday=1 is not >5, so only Saturdays would be caught. Use return_type 2 or =WEEKDAY(A2)=1 for Sunday separately.
In conditional formatting, enter the formula =OR(WEEKDAY(A$1,2)=6,WEEKDAY(A$1,2)=7) where row 1 holds the dates. Lock the row with $ so the formula checks the header date for every row in the column.
Written and reviewed by FormulaCraft Team. Each formula on this page is run through our verification engine before publishing.
Last reviewed: