Ah, and just as I sent this - the date is confirmed.

On Mon, Aug 5, 2019, 21:20 Bryce Adelstein Lelbach aka wash <brycelelbach@gmail.com> wrote:
We are still working to confirm all the details, but tentative date is 2019-09-21, onsite at CppCon 2019 in Denver, Colorado, USA. A meeting invite paper is forthcoming once we have everything finalized.

Bryce Adelstein Lelbach aka wash
CUDA Core C++ Libraries Lead @ NVIDIA
ISO C++ Library Evolution Incubator Chair
ISO C++ Tooling Chair
CppCon and C++Now Program Chair
CUDA Convert and Reformed AVX Junkie

Sleep is for the weak