Regex Tester & Validator

Matches ISO 8601 formatted timestamps with named capture groups for year, month, day, time, and timezone. Validates date components (months 01-12, days 01-31), requires time in HH:MM:SS format with optional milliseconds, and accepts either 'Z' for UTC or offsets like +05:30 restricted to 15-minute increments. Useful for parsing log files, validating API date strings, and extracting timestamps from documents.