INDIANAPOLIS – IndyCar officials have released the green flag times for the upcoming NTT IndyCar Series season.

The schedule features starting time shifts at four races – St. Petersburg, Circuit of The Americas, Iowa and Mid-Ohio – and the evening return to Richmond Raceway.

Those four returning races represent the only significant green flag start time changes from a year ago in the 17-race NTT IndyCar Series schedule, beginning with the season-opening Firestone Grand Prix of St. Petersburg scheduled for Sunday, March 15.

The notable changes:

– The Firestone Grand Prix of St. Petersburg, which began at 1:40 p.m. ET this past season, will now have a 3:30 p.m. green flag. The race on the downtown streets of St. Petersburg, Fla., will be celebrating its 10th anniversary as the series’ season opener and be televised on NBC Sports Network.

– The AutoNation IndyCar Challenge at Circuit of The Americas on Sunday, April 26, will have a similar shift, moving from a 1:43 p.m. ET green flag this past season to 4:10 p.m. (3:10 p.m. local) in 2020. The permanent road course in Austin, Texas, will play host to the fourth race of the season and be broadcast on NBCSN.

– The Iowa 300 at Iowa Speedway, set for Saturday, July 18, on NBCSN, will be better accommodated for an evening race under the lights with the green flag moving from 7:15 p.m. ET to 9 p.m. (8 p.m. local).

– The Honda Indy 200 at the Mid-Ohio Sports Car Course on Sunday, Aug. 16, will be the only race among the four that moves to an earlier start time. The race, which had a 4:05 p.m. ET start this past season, will shift to a 12:45 p.m. green flag in 2020 and be televised on NBC.

– The NTT IndyCar Series heads to Richmond Raceway – the only new addition on the schedule – for the 11th race of the season on Saturday, June 27. The field will take the green flag at 8:15 p.m. ET for the start of the first Indy car race at the .75-mile oval since 2009. The race will be broadcast on NBCSN.

Click here to see the full NTT IndyCar Series schedule with start times.