To celebrate World Ballet Day, five of the ballet companies around the world are taking to Facebook in what's being pitched as the longest livestream the platform has ever hosted, with a marathon that will last 20 hours.

On Tuesday, The Australian Ballet, Bolshoi Ballet, The Royal Ballet, and The San Francisco Ballet will tag team each other in a 20-hour relay in which each ballet house will stream for four hours.

Each company will introduce viewers to a variety of experiences from technique classes and rehearsals, to backstage preparations.

Here's the schedule:

The Australian Ballet from 10 p.m. ET

Bolshoi Ballet from 2 a.m. ET

The Royal Ballet from 6 a.m. ET

The National Ballet of Canada 10 a.m. ET

The San Francisco Ballet at 2 p.m. EST

Watch on the Facebook pages of each of the companies or the website.