⟩ Consider the following crontab entry ?59 23 13 * 5 /wipe.disk? What time will this cronjob run?
That means: on Black Friday, your hard drive will get wiped out.
==> (on 13th and Friday) 23:59, /wipe.disk will be running________________________________________If the 13'th Day of the month is Friday, the job will run. (week day starts from Sunday day 1).