TPAC session "MathML to AT" is on Monday, 3-4pm UTC, Oct 18

The schedule was just announced. The MathML breakout session is on the
first day. The time is 4pm Central European Time, 11am Eastern, 8am Pacific
Time.

You can view the full schedule here
<https://web-eur.cvent.com/event/2b77fe3d-2536-467d-b71b-969b2e6419b5/websitePage:efc4b117-4ea4-4be5-97b4-c521ce3a06db>.
In order to be a part of any of the breakout sessions, you need to
register. Registration is free. You can register here
<https://www.w3.org/2021/10/TPAC/#participation>. It is pretty minimal/fast.