Which cron syntax is supported?

Standard 5-field Unix cron: minute hour day-of-month month day-of-week. Step (*/5), range (1-5), list (1,3,5) and the wildcard (*) all work. Plus the @-shortcuts (@yearly, @monthly, @weekly, @daily, @midnight, @hourly).

In which timezone are 'Next runs' computed?

Your browser's local timezone. The cron expression itself is timezone-agnostic — interpretation happens at runtime. The 'Next runs' list shows local wall-clock times.

Is my expression sent anywhere?

No. Parsing and the human description (via cronstrue) run locally in your browser.

Cron Parser

Explain cron expressions and show next run times

Expression

Minute

Hour

Day of Month

Month

Day of Week

Examples

Expression	Meaning	Apply
* * * * *	Every minute
0 * * * *	Every hour
0 0 * * *	Every day at midnight
0 9 * * 1-5	Weekdays at 9 AM
0 0 1 * *	1st of every month
/15 * * *	Every 15 minutes
0 0 * * 0	Every Sunday at midnight
@hourly	Shortcut: hourly

Field Reference

Field	Range	Allowed special
Minute	0–59	* , - /
Hour	0–23	* , - /
Day of Month	1–31	* , - / ?
Month	1–12	* , - /
Day of Week	0–6 (Sun=0)	* , - / ?