1999        2000        2001        2002        2003        2004        2005
Orthodox Lent        2/22        3/13        2/26        3/18        3/10        2/23        3/14
Orthodox Easter        4/11        4/30        4/15        5/5        4/27        4/11        3/27

I believe that in 2004 Orth & Western Easters will coincide. Far as nI can tell, some or the more interesting days, such as Quasimodo or Pancake Tuesday are only celebrated in the Western church. And not all that many of them, either.