Cron Every Monday and Thursday at 9 AM

The cron expression 0 9 * * 1,4 schedules a task to run twice per week, on Monday and Thursday, at exactly 9:00 AM.

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). The task runs at the start of the business day.
• * (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.
• 1,4 (Day of Week): Monday and Thursday. The list notation specifies two specific days: 1 (Monday) and 4 (Thursday).

This means your task will execute twice per week at 9:00 AM on Monday and Thursday. This bi-weekly schedule creates an even distribution across the work week, with roughly 3 days between each execution (Thursday to Monday includes the weekend). It is a popular cadence for tasks that need to run more than once per week but do not require daily execution. The Monday-Thursday pairing ensures coverage at both the beginning and middle of the work week. This schedule works well for recurring team updates, periodic data syncs, and twice-weekly maintenance windows. This expression is supported by standard cron on Linux/macOS, as well as cloud services like AWS CloudWatch, Google Cloud Scheduler, and GitHub Actions.