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, The National Ballet of Canada 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 World Ballet Day website.