I'm trying to create an input box which will do two things (1) ask the user to enter a date in mm/dd/yyyy format and present an error message if the date is not valid to either retry or cancel and (2) the date entered must be a Friday, any other day of week will ask the user to retry or cancel. Not sure if this is possible with a simple input box. I'm mainly interested in part one of question but part two is only an enhancement. Thanks in advance for any comments.
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