Chrome Extension Date Capture

I have a working Chrome extension and now need it to automatically detect every date that appears anywhere on the page—headings, paragraphs, tables, even dynamically-loaded sections—and pass those values back to my script for later processing... (Budget: ₹1500 - ₹12500 INR, Jobs: API, Data Processing, Firefox, Frontend Development, Google Chrome, HTML, JavaScript, PHP, Web Development, Web Scraping)