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c# - RegEx for matching dates (Month Day, Year OR m/d/yy) - Stack Overflow
Regex to validate date formats dd/mm/YYYY, dd-mm-YYYY, dd.mm.YYYY, dd mmm YYYY, dd-mmm-YYYY, dd/mmm/YYYY, dd.mmm.YYYY with Leap Year Support - Stack Overflow
python regex match date - YouTube
nintex workflow - RegEx to extract Date from time - Stack Overflow
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Regular Expressions
How to Add Data Validation in Forms with RegEx - Digital Inspiration