Cron syntax describes recurring schedule fields such as minute, hour, day, month, and weekday. Implementations differ, especially around timezone, day-of-month versus day-of-week behavior, and support for extensions.
Verify the schedule in its runtime
Read each field from left to right and confirm the target scheduler's dialect. Previewing upcoming times helps catch a mistaken interval or weekday.
- Paste the expression into the parser.
- Review the explanation for every field.
- Inspect the next scheduled run times.
- Confirm timezone and syntax against the scheduler that will execute it.
Keep in mind: A preview is not a guarantee of execution; the scheduler's own timezone, outages, and job rules still apply.