These examples make use of the Days of the Week tiddler.
10 6 4 9 3 2 8 +[sortby[1 2 3 4 5 6 7 8 9 10]]
Friday Tuesday Monday Thursday Sunday +[sortby{Days of the Week!!list}]
1 Mon 5 Fri 4 Tue Sun 2 +[sortby{Days of the Week!!short}]