Reference Explainer
Cron Expressions
Cron schedules define recurring jobs with compact time fields.
What It Is
- Standard cron commonly uses five fields: minute hour day month weekday.
- Expressions like */15 define fixed intervals for a field.
- System implementations differ on support for seconds and aliases.
Common Pitfalls
- Assuming timezone behavior without explicit configuration.
- Using unsupported cron syntax for a specific platform.
- Overlapping schedules causing duplicate job execution.