Is 'every midnight' the same cron expression as 'every day'?

Yes — both resolve to 0 0 * * *. "Every midnight" just emphasizes that the daily run happens specifically at 00:00, since 'every day' technically leaves the hour unspecified until you fill it in.

Why do so many cron jobs default to midnight?

It's a natural, memorable boundary between calendar days and traditionally a lower-traffic hour for many businesses, making it a longstanding convention for nightly batch processing.

How do I avoid the 'midnight thundering herd' when I have many jobs?

Stagger their minute fields across a range (0, 5, 10, 15 minutes past midnight, etc.) instead of pinning every job to exactly 0 0 * * *.

Cron: Every Midnight

0 0 * * * fires once a day at exactly midnight (00:00) — identical to the daily schedule, but the search term "every midnight" specifically emphasizes the time-of-day rather than the frequency. It's the classic slot for nightly batch jobs, log rotation, and backups.

0 0 * * *

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Examples & Variations

0 0 * * *

Every day at midnight

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0 0 * * 1-5

Midnight, weekdays only

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5 0 * * *

5 minutes past midnight, to avoid exact-midnight clustering

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Common Mistakes

Scheduling every nightly job at the exact same second (0 0 * * *) — if you run several jobs this way, they all compete for resources simultaneously at midnight.
Assuming midnight is a quiet time globally — for services with international users, midnight server time can be the middle of the business day somewhere else.
Not accounting for the twice-a-year daylight saving transition if cron runs in local time — midnight can be skipped or duplicated on DST change days.

Best Practices

Offset competing midnight jobs by a few minutes each (0 0, 5 0, 10 0) so they don't all spike resource usage at the exact same second.
Run cron in UTC when the literal wall-clock hour doesn't matter to end users, sidestepping DST ambiguity entirely.
For services with a genuinely global user base, there often isn't a universally 'quiet' hour — pick the time that's least disruptive for your specific majority timezone instead.

Frequently Asked Questions

Is 'every midnight' the same cron expression as 'every day'?: Yes — both resolve to 0 0 * * *. "Every midnight" just emphasizes that the daily run happens specifically at 00:00, since 'every day' technically leaves the hour unspecified until you fill it in.
Why do so many cron jobs default to midnight?: It's a natural, memorable boundary between calendar days and traditionally a lower-traffic hour for many businesses, making it a longstanding convention for nightly batch processing.
How do I avoid the 'midnight thundering herd' when I have many jobs?: Stagger their minute fields across a range (0, 5, 10, 15 minutes past midnight, etc.) instead of pinning every job to exactly 0 0 * * *.

Related Tools

Cron Parser

Translate cron expressions to plain English

Cron Cheat Sheet

Quick reference for cron syntax, special characters, and shortcuts

Cron Examples Library

Browse and search common cron expression examples

Cron: Last Day of the Month

Standard cron can't directly express 'last day of month.' See the common workaround using 28-31 * * plus a date check, and the Quartz L character alternative.

Cron: Every Noon

The cron expression for every noon is 0 12 * * *, running once daily at 12:00 PM. See noon scheduling examples and best practices.

Cron: Every 45 Minutes

*/45 * * * * does NOT run every 45 minutes on a rolling basis — it only matches minutes 0 and 45. See why, and how to actually get even 45-minute spacing.