Cron at Start of Business Day (9 AM Weekdays)

The cron expression 0 9 * * 1-5 schedules a task to run at 9:00 AM every weekday, marking the start of the standard business day.

Field-by-field breakdown:

• 0 (Minute): At minute 0. The task fires at the top of the hour.
• 9 (Hour): At hour 9 (9 AM). This aligns with the conventional start of business hours in most industries.
• * (Day of Month): Every day from 1 through 31. No restriction on the day of the month.
• * (Month): Every month from January through December. No restriction on which month.
• 1-5 (Day of Week): Monday through Friday. The range covers all five standard business days.

This means your task will execute 5 times per week, once each weekday at 9:00 AM. The start-of-business-day trigger is one of the most useful scheduling patterns for enterprise automation. It is the ideal time to send daily digest emails, populate morning dashboards, activate business-hour configurations, start SLA tracking timers, or distribute daily task assignments. Because this is a very popular scheduling time, consider whether your task is time-sensitive enough to need exactly 9:00 AM or could be staggered a few minutes to reduce load. This expression is identical to every-weekday-at-8am shifted one hour later. This expression is supported by standard cron on Linux/macOS, as well as cloud services like AWS CloudWatch, Google Cloud Scheduler, and GitHub Actions.