Here are Cartoon Network, Cartoonito, and HBO Max's premieres for September. The info here may be incomplete and is subject to change. If I missed anything or made any mistakes, please let me know and I'll add/fix it as soon as I can.
Cartoonito
Batwheels
Thursday, September 17 - 101 - Secret Origin of the Batwheels [HBO Max]
Bugs Bunny Builders
Monday, September 26 - 9:30 A.M. (EST) - 109 - Rock On
Tuesday, September 27 - 9:30 A.M. (EST) - 110 - Buzz In
Wednesday, September 28 - 9:30 A.M. (EST) - 111 - Stories
Thursday, September 29 - 9:30 A.M. (EST) - 112 - Cheesy Peasy
Friday, September 30 - 9:30 A.M. (EST) - 113 - Looney Science
Lucas the Spider
Tuesday, September 6 - 10 A.M. (EST) - 201 - Puppy Love/House Grand Prix/Farewell, Sweet Ride [SEASON PREMIERE]
Monday, September 12 - 10:05 A.M. (EST) - 202 - The Mighty Boop and Fly Wonder/Lucas and Findley Get Antsy/Mock Me Not
Monday, September 19 - 10:05 A.M. (EST) - 203 - Jumping Pal/Trouble at the Top/Avocado's Fan
Mecha Builders
Thursday, September 1 - 9 A.M. (EST) - 114 - Cross That Bridge/Knock Knock! Who's There?
Friday, September 2 - 9 A.M. (EST) - 115 - The Pinecone Palooza/Big-Footed Cave Bird
Pocoyo
Friday, September 2 - 6 A.M. (EST) - 393 - Winter Games
Tuesday, September 6 - 6 A.M. (EST) - 394 - Dragon Island
Thomas & Friends: All Engines Go!
Monday, September 12 - 8:30 A.M. (EST) - 301 - Percy Disappears [SEASON PREMIERE]
Monday, September 12 - 8:45 A.M. (EST) - 302 - Shake, Rattle & Bruno
Monday, September 19 - 8:30 A.M. (EST) - 303 - Fast Friends
Monday, September 26 - 8:30 A.M. (EST) - 304 - Ashima's Amazing Arrival
Cartoon Network
Looney Tunes Cartoons
Thursday, September 29 - 502 - Bugs Bunny's Howl-o-Skreem Spooktacula [HBO Max]
Teen Titans GO!
Monday, September 12 - 5 P.M. (EST) - 748 - Jump City Rock
Tuesday, September 13 - 5 P.M. (EST) - 749 - Natural Gas
Wednesday, September 14 - 5 P.M. (EST) - 750 - 50% Chad
Thursday, September 15 - 5 P.M. (EST) - 751 - The Score
Friday, September 16 - 5 P.M. (EST) - 752 - 365! [SEASON FINALE]
Movies/Specials
Sunday, September 4 - 6 P.M. (EST) - The Croods
Monday, September 5 - 5:30 P.M. (EST) - Megamind: The Button of Doom
Wednesday, September 7 - Cartoon Network: Animated Through the Years [HBO Max]
Saturday, September 17 - 6 P.M. (EST) - Mr. Popper's Penguins
Cartoonito
Batwheels
Thursday, September 17 - 101 - Secret Origin of the Batwheels [HBO Max]
Bugs Bunny Builders
Monday, September 26 - 9:30 A.M. (EST) - 109 - Rock On
Tuesday, September 27 - 9:30 A.M. (EST) - 110 - Buzz In
Wednesday, September 28 - 9:30 A.M. (EST) - 111 - Stories
Thursday, September 29 - 9:30 A.M. (EST) - 112 - Cheesy Peasy
Friday, September 30 - 9:30 A.M. (EST) - 113 - Looney Science
Lucas the Spider
Tuesday, September 6 - 10 A.M. (EST) - 201 - Puppy Love/House Grand Prix/Farewell, Sweet Ride [SEASON PREMIERE]
Monday, September 12 - 10:05 A.M. (EST) - 202 - The Mighty Boop and Fly Wonder/Lucas and Findley Get Antsy/Mock Me Not
Monday, September 19 - 10:05 A.M. (EST) - 203 - Jumping Pal/Trouble at the Top/Avocado's Fan
Mecha Builders
Thursday, September 1 - 9 A.M. (EST) - 114 - Cross That Bridge/Knock Knock! Who's There?
Friday, September 2 - 9 A.M. (EST) - 115 - The Pinecone Palooza/Big-Footed Cave Bird
Pocoyo
Friday, September 2 - 6 A.M. (EST) - 393 - Winter Games
Tuesday, September 6 - 6 A.M. (EST) - 394 - Dragon Island
Thomas & Friends: All Engines Go!
Monday, September 12 - 8:30 A.M. (EST) - 301 - Percy Disappears [SEASON PREMIERE]
Monday, September 12 - 8:45 A.M. (EST) - 302 - Shake, Rattle & Bruno
Monday, September 19 - 8:30 A.M. (EST) - 303 - Fast Friends
Monday, September 26 - 8:30 A.M. (EST) - 304 - Ashima's Amazing Arrival
Cartoon Network
Looney Tunes Cartoons
Thursday, September 29 - 502 - Bugs Bunny's Howl-o-Skreem Spooktacula [HBO Max]
Teen Titans GO!
Monday, September 12 - 5 P.M. (EST) - 748 - Jump City Rock
Tuesday, September 13 - 5 P.M. (EST) - 749 - Natural Gas
Wednesday, September 14 - 5 P.M. (EST) - 750 - 50% Chad
Thursday, September 15 - 5 P.M. (EST) - 751 - The Score
Friday, September 16 - 5 P.M. (EST) - 752 - 365! [SEASON FINALE]
Movies/Specials
Sunday, September 4 - 6 P.M. (EST) - The Croods
Monday, September 5 - 5:30 P.M. (EST) - Megamind: The Button of Doom
Wednesday, September 7 - Cartoon Network: Animated Through the Years [HBO Max]
Saturday, September 17 - 6 P.M. (EST) - Mr. Popper's Penguins
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