From the Facebook event description:

Registration is open:
https://j4dec2020.dancecamps.org/booking.php

Jazz at 4 (Alice, Frida, Remy, and Skye) are offering an online weekend event in December. The classes will be on Zoom.

The 11th: FREE / 8pm-10pm (UTC+1)
> Welcome Party
The 12th:
> Solo Jazz classes with Skye & Frida
The 13th:
> Lindy Hop classes with Remy & Alice

All the classes will be 1 hour and 15 minutes long and we will have different time zone sessions so you can join us on this weekend wherever you are in the world. So check the schedule and select the program/timing that suits you best!
— Looking forward to dancing with you all