It's one of the best days of the year for every NTT INDYCAR SERIES fan -- the opening day of practice for the Indianapolis 500 presented by Gainbridge.

Cars were up to speed starting at noon ET today on the 2.5-mile Indianapolis Motor Speedway oval, preparing for PPG Presents Armed Forces Qualifying this weekend and 110th edition of "The Greatest Spectacle in Racing" on Sunday, May 24.

On-track activity continues until 6 p.m. ET today. Here's the information you need to know to follow all the action:

TV Schedule

Noon-4 p.m. ET: FS2

4-6 p.m. ET: FS1

Radio Schedule

Noon-6 p.m. ET: INDYCAR Radio powered by OnlyBulls

Live Timing

indycar.com/leaderboard

Stay tuned to INDYCAR.com, the INDYCAR App powered by NTT DATA and INDYCAR social channels after the session for complete reports, notes, videos and more.