I totally relate-spent hours on this exact problem, mostly because of a sneaky leading space in the ID string! Beyond that, trimming whitespace from the user input is a great habit before running any checks, especially when you do javascript validate dates. What really helped me was combining the regex check with your Date object validation. This double layer makes sure you catch formatting issues and invalid dates (like 02/30/2023). Interestingly, it’s the same principle I apply in javascript array intersection: sanitize and structure data upfront, and everything else just falls into place more smoothly.