Cron every Friday at midnight: the expression, explained, in Node.js

The cron expression for “every Friday at midnight” is 0 0 * * 5. This page shows what each field does, the next five times it will fire, the mistake most people make with it, and a working Node.js example you can paste.

The expression

0 0 * * 5

Field	Value	Meaning
minute	0	exactly 0
hour	0	exactly 0
day of month	*	every day of month
month	*	every month
day of week	5	Friday only

Next five runs (UTC, from now)

2026-09-18 00:00 UTC
2026-09-25 00:00 UTC
2026-10-02 00:00 UTC
2026-10-09 00:00 UTC
2026-10-16 00:00 UTC

Mistakes people make with this schedule

Filling both day-of-month and day-of-week. In classic cron they combine with OR, so "0 0 1 * 5" runs on the 1st and on every Friday.
Assuming the server clock is your clock. Cron runs in the machine’s timezone unless the runtime says otherwise; the examples here are UTC.
No lock around a job that might overlap itself, and no alert when it silently stops. That second one is what Supercrontab is for.

Run it in your stack

Linux crontab Laravel WordPress Next.js / Vercel Node.js Python Docker GitHub Actions

import cron from 'node-cron';

cron.schedule('0 0 * * 5', async () => {
  await runReport();
}, { timezone: 'UTC' });

In-process schedulers die with the process. Fine for one long-lived server, not for serverless.

Questions

Does 0 0 * * 5 run in my local time?

Only if the scheduler is configured for it. crontab uses the system timezone; Vercel and GitHub Actions always use UTC; Laravel and node-cron take a timezone option. In Supercrontab the timezone is a field on the job.

What if the previous run is still going?

Classic cron starts the next run anyway. Add a lock (flock on Linux, withoutOverlapping() in Laravel) or let Supercrontab skip the tick while the previous request is open.

Is there a shorter way to write this?

No. The five-field form is the shortest portable version.