2011-09-12 - [GRASE-Hotspot] ask about strtotime

Header Data

From: ????? ?????? <pa***s@yahoo.com>
Message Hash: 76361e51e24029244cf8a85fa0cc65fa3112ef5fd24687cdfcd017c1b12b2854
Message ID: <1315825038.30171.YahooMailNeo@web161606.mail.bf1.yahoo.com>
Reply To: N/A
UTC Datetime: 2011-09-12 03:57:18 UTC
Raw Date: Mon, 12 Sep 2011 03:57:18 -0700

Raw message 

can u help me, again :D
i want to make a group that will expire all of it user at 12th every month, whenever i create them..
if i create user before 12th this month they will expire at 12th this month. if i create after 12th then they will expire 12th next month..

i've tried several code like "twelfth day next month" but it didnt work.. its the same as +12..

Thread