Cron Expression Parser

Tips

• • Use * for "every" and */N for "every N units" (e.g., */5 for every 5 minutes)
• • Ranges use a dash: 1-5 (Monday through Friday for day of week)
• • Lists use commas: 1,3,5 (specific values)
• • Day of week: 0=Sunday, 1=Monday, ..., 6=Saturday
• • Combine steps with ranges: 1-30/2 means every 2nd value from 1 to 30
• • This parser handles standard 5-field cron expressions (no seconds or year fields)