How disable Sunday in salesforce standard datepicker??
closed as unclear what you're asking by Sebastian Kessel, David Reed♦, Brian Mansfield, battery.cord, glls Jun 6 '18 at 18:51
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There's no officially approved way to modify date picker like this. Instead, you could just display an error when the user selects a Sunday, or you could write your own date picker (or use one from jQuery or something).