I'm working with a date and time column and need a validation that returns true if the day of the week is Monday OR Friday. Users are not permitted to add an item on any other day of the week.
=TEXT([Date & Time],"dddd")="Monday"
This formula works perfectly for allowing only dates that are a Monday, I just need to add Friday into the same validator.
Sharepoint 2010
Any suggestions are greatly appreciated.
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