Cron Twice Monthly

Understanding the Expression

The cron expression 0 0 1,15 * * breaks down as follows:

Field	Value	Meaning
Minute	0	At minute 0
Hour	0	At midnight (00:00)
Day of month	1,15	Days 1,15 of the month
Month	*	Every month
Day of week	*	Every day of the week

Example Usage

Basic crontab entry

0 0 1,15 * * /path/to/your/script.sh

With output logging

0 0 1,15 * * /path/to/script.sh >> /var/log/script.log 2>&1

With monitoring

0 0 1,15 * * /path/to/script.sh && curl -fsS https://cronsignal.io/ping/YOUR_CHECK_ID

Common Use Cases for Twice Monthly

• Monthly reports: Generate end-of-month financial reports
• Billing operations: Process invoices and subscriptions
• Compliance tasks: Run monthly security and audit reports
• Data archival: Archive old data to long-term storage