New timetables for Metro-North Railroad -- including the New Haven Line -- take effect today, Sunday, April 3.

The changes mostly involve minor adjustments, but to be sure, check here: http://www.mta.info/mnr/html/serviceupdates.htm?story=685.

Or pick up a paper copy of the new schedules -- they're supposed to be available now at local rail depots and at Grand Central Terminal in New York City.