Regex scenarios to Capture Dates in 'DD-MM-YYYY' Format with Optional Leading Zeros in C#
Hey everyone, I'm running into an issue that's driving me crazy. I'm a bit lost with After trying multiple solutions online, I still can't figure this out. I've been banging my head against this for hours. I'm trying to validate and capture dates in the format 'DD-MM-YYYY', where both the day and month can optionally have leading zeros (e.g., '01-09-2023' or '1-9-2023'). However, my current regex pattern isn't functioning as expected, and it's not capturing the leading zeros correctly. Here's what I've tried so far: ```csharp string pattern = "^(0?[1-9]|[12][0-9]|3[01])-(0?[1-9]|1[0-2])-(\d{4})$"; Regex regex = new Regex(pattern); var testDates = new[] { "01-02-2023", "1-2-2023", "31-12-2023", "31-13-2023", "00-01-2023" }; foreach (var date in testDates) { if (regex.IsMatch(date)) { Console.WriteLine($"Matched: {date}"); } else { Console.WriteLine($"Did not match: {date}"); } } ``` To my surprise, the pattern works for valid dates, but it incorrectly matches invalid dates like '31-13-2023' and fails to capture dates where the day or month does not have a leading zero. I need a more robust solution that ensures leading zeros are recognized properly, while still validating correct date formats. Any suggestions on how to adjust my regex for this case? My current setup uses .NET 5.0, and I'm following the best practices for regex usage in C#. Thanks in advance for your help! I'm working on a application that needs to handle this. Has anyone else encountered this? For context: I'm using C# on Debian. Any suggestions would be helpful. This is happening in both development and production on Windows 11.