Help

FAQ

Short answers for field rules, calendars, and timezones. Deeper notes live on the blog.

Are expressions uploaded?

No. Generation stays in the browser. See the Privacy Policy.

Why only five fields?

That matches classic crontab. Six-field (seconds) or seven-field (year) dialects are extensions and are not generated here.

Day and weekday both set, but results look wrong?

Many cron implementations treat non-* day and weekday as OR. For weekdays only, leave Day as * and set Weekday to 1-5.

What about short months (28–30 days)?

Cron does not clamp to the last day of the month. Day 31 only fires in months that have 31 days; day 30 skips February; day 29 in February only runs in leap years. The generator shows a calendar note when your day-of-month can be invalid.

Next runs disagree with the server?

Preview uses the browser timezone; servers may use UTC or another zone. Trust a live check in the target environment.

Something else?

Use Contact and include browser, scheduler type, and a sample expression.