How do I schedule jobs in Jenkins? -Jenkins Schedule

By setting the jenkins schedule period to 15 13 * * * you tell Jenkins to schedule the build every day of every month of every year at the 15th minute of the 13th hour of the day.

Jenkins used a cron expression, and the different fields are:

MINUTES Minutes in one hour (0-59)

HOURS Hours in one day (0-23)

DAYMONTH Day in a month (1-31)

MONTH Month in a year (1-12)

DAYWEEK Day of the week (0-7) where 0 and 7 are sunday

For more information please refer:https://github.com/jenkinsci/jenkins/blob/master/core/src/main/resources/hudson/triggers/TimerTrigger/help-spec.jelly

For scheduling the job at 4:20 AM. then you can use:

20 4 * * *