Which cron syntax is supported?

Standard 5-field POSIX cron (minute hour day month weekday) plus ranges (1-5), steps (*/15), and lists (1,3,5). Quartz-style 6/7 field cron (with seconds) is not supported.

What about @hourly, @daily, @reboot?

Named shortcuts aren't supported — use the equivalent 5-field expression (e.g., @daily → '0 0 * * *').

Is the time zone considered?

Cron expressions themselves don't carry timezone info. The description is timezone-agnostic — whether '0 9 * * *' means 09:00 UTC, KST, or local depends on the system that runs it.

Does the language follow my site language?

Yes. Descriptions are rendered in the current page locale (en/ko/ja/es/pt/zh).

Cron Expression Explainer

Paste any standard 5-field cron expression and see a plain-language description of when it runs, plus a field-by-field breakdown. Quick example chips load common schedules (every minute, weekdays at 9, every 15 minutes, etc.) so you can build by analogy. Localized output for English, Korean, Japanese, Spanish, Portuguese, and Chinese.

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Cron expressionUse 24-hour time

Description

Fields

Minute

Hour

Day

Month

1-5

Weekday

Examples

How to use

Type or paste a cron expression like '0 9 * * 1-5'.
Read the plain-language description below.
Inspect each of the 5 fields (minute, hour, day, month, weekday).
Click an example chip to load a common pattern.

Frequently asked questions

Which cron syntax is supported?: Standard 5-field POSIX cron (minute hour day month weekday) plus ranges (1-5), steps (*/15), and lists (1,3,5). Quartz-style 6/7 field cron (with seconds) is not supported.
What about @hourly, @daily, @reboot?: Named shortcuts aren't supported — use the equivalent 5-field expression (e.g., @daily → '0 0 * * *').
Is the time zone considered?: Cron expressions themselves don't carry timezone info. The description is timezone-agnostic — whether '0 9 * * *' means 09:00 UTC, KST, or local depends on the system that runs it.
Does the language follow my site language?: Yes. Descriptions are rendered in the current page locale (en/ko/ja/es/pt/zh).

Guides on this topic

How Cron Schedules Actually Work The five cron fields and their syntax, the day-of-month/day-of-week rule almost everyone gets wrong, what daylight saving does to a nightly job, and how to design schedules that survive restarts.

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