I don't know if I can pull it off, but there are two free Messiaen concerts happening today, both at 5pm: "L'Ascension" on the organ at St. Thomas, and the "Quartet for the End of Time" at Town Hall. The latter is being played by TASHI (Peter Serkin, Richard Stoltzman, Fred Sherry, and Ida Kavafian) who are making their first New York appearance in over 30 years. Game plan: hit St. Thomas first, then hop the V to Town Hall, where the Messiaen is on the second half of the bill. My Metrocard's about to get a workout.