Starting with Spring 2008 tuition fees and beyond, the fee deadline will now be the 15th of the month, except when the 15th is a weekend, the deadline will be the following Monday. As a result, Spring 2008 fees will be due on Monday, March 17. There is no longer a ‘grace period’ for students missing the fee deadline: You will be dropped from your classes on March 17 if your payment is not received by the university. You will be receiving further notices about this soon, but we wanted to give you advanced warning.
http://www.reg.uci.edu/registrar/soc/quartercalendar07-08.html