Cheat Sheets · Cron Cheat Sheet · Cron Twice a Day — 9 AM & 6 PM Schedule

Cron Twice a Day — 9 AM & 6 PM Schedule

0 9,18 * * *

Runs twice a day — at 09:00 (morning) and 18:00 (evening).

Field by field

Field	Value	Meaning
`Minute`	`0`	At minute 0
`Hour`	`9,18`	At 9 AM and 6 PM (18:00)
`Day of month`	`*`	Every day
`Month`	`*`	Every month
`Day of week`	`*`	Every day of the week

While */12 splits the clock at midnight and noon, most human-centric workflows need morning and evening syncs. Using a comma-separated list in the hour field (9,18) lets you target specific business hours.

0 9,18 * * * /usr/local/bin/daily-digest.sh

Related schedules

0 */12 * * * Every 12 hours (00:00 & 12:00) 0 0,12 * * * Midnight and noon 0 9 * * 1-5 Weekdays at 9 AM

FAQ

Can I pick different hours like 8 AM and 5 PM?
Yes: simply change the hour field to 8,17.

How do I run this only on weekdays?
Change day-of-week to 1-5: 0 9,18 * * 1-5.

Does cron support AM/PM syntax?
No, standard cron requires 24-hour notation (0 to 23). 6 PM must be written as 18.

Stop memorizing — build it interactively

Try this schedule in the Cron Editor

Full reference: Cron Cheat Sheet