Cron Weekdays at 9 AM

Understanding the Expression

The cron expression 0 9 * * 1-5 breaks down as follows:

Field	Value	Meaning
Minute	0	At minute 0
Hour	9	At 9:00
Day of month	*	Every day of the month
Month	*	Every month
Day of week	1-5	Monday through Friday

Example Usage

Basic crontab entry

0 9 * * 1-5 /path/to/your/script.sh

With output logging

0 9 * * 1-5 /path/to/script.sh >> /var/log/script.log 2>&1

With monitoring

0 9 * * 1-5 /path/to/script.sh && curl -fsS https://cronsignal.io/ping/YOUR_CHECK_ID

Common Use Cases for Weekdays at 9 AM

• Business hour jobs: Run tasks during working hours only
• Off-peak processing: Heavy tasks during low-traffic periods
• Scheduled notifications: Send alerts during appropriate hours
• Workday automation: Automate business processes on weekdays

Platform Equivalents

The same schedule expressed across common platforms and schedulers:

Timezone Considerations

Midnight UTC on weekdays equals Sunday 7-8 PM in US timezones — still the weekend locally. For true weekday-morning runs, adjust the UTC hour for your server timezone.

Common Mistakes

• Day numbering: 1-5 means Monday through Friday. Day 0 and day 7 both equal Sunday.
• Day-of-month + day-of-week OR logic: If both fields are non-*, the job runs when either is true — not when both are true.
• AWS EventBridge: Uses day names and requires ? for day-of-month: cron(0 0 ? * MON-FRI *).