Sundays (& St Patrick's Day):
6pm (Vigil);10am; 12 noon; 9pm

Holydays (Mon-Fri):
6pm (Vigil) - no 6pm Mass if vigil falls on Sunday;
7.30am; 12 noon;  9pm  - no 9pm Mass for Holyday falling on Saturday (it's a Sunday Mass)  

Mon-Fri: 7.30am; 10am; 12 noon (no 10am Mass)

Saturdays: 10am; 12 noon; 6pm (Vigil)

Bank Holidays: 10am; 12 noon  

Useful link: Mass times locally in Dublin (from www.catholicclocks.com)

 Times of Masses in local churches