Once the program is ready for the public you add it to a page using what wordpress calls a shortcode.
This work by adding a special text to a page. Example: [get-program-timegrid] with one or more parameters.
The program can be styled to the festival style, here is a simple presentation and examples of use of the shortcode:

You have 2 options for this: timegrid and list
 

Timegrid

Place the artist in a time-grid. This is great for visualizing the festival, especially if you have many venues and artist.
Here you also have a my program option. Click on an artist you like to see and it’s highlighted. The click my program and you only get the gigs you are interested in.
[get-program-timegrid]
The following parameters is available:

• event
• date
• venue
• gig
• time_order_by: asc (default) or desc

Get the program for an event: ascending order

Get the program for an event: descending order

List

[get-program]
The following parameters is available:

• event
• date
• venue
• gig

Get the program for an event:

Get the program for a Specific date:

Get the program for a Specific gig: