If you have a need for more advanced organization within your event you may be interested in this new feature.
Display Below Previous Task allows you to group tasks together. Here is an example that has 3 tasks together in one tab and 3 in another tab. Friday contains Front Gate Beer Tent, and Food Tent:
Here is what it looks like in Signup Sheet Design - note the 3 Friday tasks and the 3 Saturday tasks:
The trick to make this work is to make the 2nd, 3rd, 5th and 6th Tasks "Display Below Previous Task" (circled Below):