Cron Every Month on the 25th at 9 AM

The cron expression 0 9 25 * * schedules a task to run once per month on the 25th 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.
• 25 (Day of Month): On the 25th day of the month only. The task is restricted to this specific calendar date.
• * (Month): Every month from January through December. No restriction on which month.
• * (Day of Week): Every day of the week from Sunday through Saturday. No restriction on the day of the week, since the day-of-month field already pins the date.

This means your task will execute 12 times per year, once on the 25th of each month at 9:00 AM. The 25th is a popular choice for monthly financial tasks because it falls near the end of the month but is guaranteed to exist in every month (unlike the 29th, 30th, or 31st). Many businesses use the 25th as a cut-off date for monthly billing cycles, making it a natural trigger point for invoicing, reporting, and account reconciliation. The 9 AM timing ensures the task runs at the start of the business day when finance teams are available to review results. This expression is supported by standard cron on Linux/macOS, as well as cloud services like AWS CloudWatch, Google Cloud Scheduler, and GitHub Actions.