Cron expression for every 45 minutes
The cron expression to run a job every 45 minutes is */45 * * * *. See the next run times in your timezone, plus the uneven-interval gotcha this schedule hides.
*/45minute*hour*day*month*weekday*/45 does not divide the minute range evenly
Steps restart each cycle, so the gap between 45 and the next run is 15, not 45. Use an explicit list for an even spacing.
In Plain English
What your cron expression actually means.
Upcoming Executions
Preview the next 50 times this schedule will trigger.
About */45 * * * *
*/45 * * * * is the usual answer for "every 45 minutes", but it isn't evenly spaced. Steps restart at the top of every hour, so the last run of one hour and the first of the next are closer together than 45 minutes. The warning below shows the exact gap.
Cron reads the five fields as minute hour day month weekday. For this schedule that breaks down as:
*/45— minute*— hour (every value)*— day of month (every value)*— month (every value)*— day of week (every value)