cron every thirty minutes from 13:00 to 17:00 seems easy, but the obvious entry also runs it at 17:30

cronie 1.5.2 on RHEL 8.10 This entry runs foobar every 30 minutes from 13:00 to 17:30. */30 13-17 * * 1-5 foobar.sh Is there some clever (but not hackish, like adding "exit if it's 17:30" to the script) way to get it to not run at 17:30, or is brute force (two crontab entries) the best way? */30 13-16 * * 1-5 foobar.sh 0 17 * * 1-5 foobar.sh