The formatting trap
CRON expressions define regular interval schedules, predominantly used in Unix-like operating systems to run scripts (via a crontab daemon). It consists of 5 or 6 fields separated by spaces.
The Timezone Trap: Production servers are overwhelmingly provisioned in Coordinated Universal Time (UTC). If a developer writes a cron rule expecting it to run at "Midnight" local time, the physical execution can be distorted by hours, often running directly in the middle of high-traffic daytime peaks.
Always compare your UTC translated offset using a tool like this before deploying infrastructure automation.