The Long Island Rail Road will make schedule changes on all branches starting Monday, Metropolitan Transportation Authority officials said Sunday.

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Starting midday, LIRR train service at Lindenhurst, Copiague, and Amityville will be restored from hourly to half-hourly. Weekday connecting times for midday trains on other branches will go back to normal as well.

Weekend and rush-hour trains are not affected by these changes, MTA officials said. Riders looking for a revised midday train departure schedule can pick up a new timetable sheet dated Aug. 21 to Sept. 4 or visit MTA’s website.