Answer by Richard Holloway for When does `cron.daily` run?

For the distributions you mention:

On CentOS 5.4 (Should be same for RHEL5)

grep run-parts /etc/crontab01 * * * * root run-parts /etc/cron.hourly02 4 * * * root run-parts /etc/cron.daily22 4 * * 0 root run-parts /etc/cron.weekly42 4 1 * * root run-parts /etc/cron.monthly

So cron.daily runs at 04:02am.

Same on CentOS 4.8