execute crontab twice daily at 00h and 13:30

Question

i want to execute a script twice daily at 00:00 and 13:30 so i write :

0,30 0,13 * * *

it seems wrong for me, because like this, the script

Answer 1

try ...

00,30 00,13 * * * [ `date +%H%M` == 1330 ] || [ `date +%H%M` == 0000 ] && logger "its time"