Starting this thread a bit early, because there has been information regarding TGS 2021.
Dates the Event is Held: Sep. 30 to Oct. 3, 2021
Image of Schedule:
The image is released by CESA (TGS Organizer) so all are in Japanese Time (UTC+9). MS will have it's conference on 30th Sep 6 p.m. (Jpn Time), but notable, both Sony and Nintendo - the actual Japanese Console Makers are absent. All the major Japanese 3rd Parties such as SEGA/Atlus, Square Enix, Capcom, Bandani Namco, Spike Chunsoft etc. are all there. Surprisingly Konami is there as well (Maybe for new Video Game Announcement?)
Places to Watch:
YT, Twitch and (For Japanese) NicoNico.
Most probably all the publishers are going to have their own channels (No TGS MegaVideo, I guess). At least SE has it's own video link (To be posted in the following post), so I guess all will follow suit.