If you want to get from A to B today by public transport you might have to calculate in a little bit more time. During the Easter holidays the timetables are a little different.
Today as well as on Sunday and Monday all metros, busses, trams and trains operate according to the Sunday timetable. On Saturday nothing changes though. You can find more detailed information on all the changes on HSL's website.
So be sure to check your connection before heading out.
Have a nice Easter weekend!