Fix Cron Job Timezone Issues

The Problem

Your cron job runs at the wrong time because the server timezone differs from your local timezone, or DST changes shift the schedule.

The Solution

Set TZ in your crontab or use UTC consistently. Add CronRabbit monitoring to verify jobs run at the expected time.

Understanding Cron Timezones

Cron uses the system timezone by default. If your server is in UTC but you schedule for '0 9 * * *' expecting 9 AM local time, the job runs at 9 AM UTC instead.

Solutions

1. Set TZ=America/New_York in your crontab. 2. Convert times to UTC. 3. Use CronRabbit's timezone-aware scheduling to verify.

Code Examples

Set timezone in crontab

Bash

# Set timezone at top of crontab
TZ=America/New_York

# This now runs at 9 AM Eastern time
0 9 * * * /scripts/morning-report.sh && curl -fsS -m 10 --retry 5 --retry-all-errors https://ping.cronrabbit.com/your-id

# Check current timezone
timedatectl

# Set server timezone (if needed)
sudo timedatectl set-timezone UTC

Related Guides

Common Errors

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