Regex Editor & Tester

This regex matches a date and time string formatted commonly used in GPFS (General Parallel File System) logs, starting with the year, month, and day separated by hyphens, followed by an underscore and the time (HH:MM:SS). It allows for optional fractional seconds and supports either a 'Z' (UTC) or a timezone offset like '+00' or '-05'. This pattern is typically used for parsing and validating log entries or file timestamps in IBM Spectrum Scale (formerly GPFS) environments.