[CentOS] Logrotate base

Thu Feb 12 04:05:09 UTC 2009
Fajar Priyanto <fajarpri at arinet.org>

Hi guys,
Logrotate is checked every day by cron.daily, right?
I notice in logrotate.conf by default it's weekly.
If I change it into monthly (now, on 12 of Feb), when will it do the
monthly rotation?
a. On 12 of March or
b. On 1st of March?

Thanks for any insight.