Cron Jobs in Node.js: The Practical Guide Nobody Gave Me

I spent 3 hours debugging why my cron job only ran once. Here's everything I wish I'd known before starting.

Why This Matters

Every serious application needs scheduled tasks:

Send daily digest emails at 9 AM

Clean up temp files every Sunday

Generate reports on the 1st of each month

Check API health every 5 minutes

I've tried every approach. Here's what works, what doesn't, and what I use in production.

Option 1: node-cron (Best for Most Cases)

npm install node-cron

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The gold standard for Node.js scheduling:

const cron = require ( ' node-cron ' );

// Run every day at 9:00 AM cron . schedule ( ' 0 9 * * * ' , () => { console . log ( ' Sending daily digest... ' ); sendDailyDigest (); });

// Run every 5 minutes cron . schedule ( ' */5 * * * * ' , async () => { const status = await checkAPIHealth (); if ( ! status . ok ) alertAdmin ( status ); });

// Run on Mondays at 8:00 AM cron .…