The challenges on this list run by Date, not Day.
Zoë here with the update list of challenges that started between the 2nd of the month and the 8th. Each week a by date list is published, if you want to check back to an earlier one just use the labels!
LeAnn's World 101 - Open, E3, UE (w/ LeAnn's image), T3, SW & RW - (#42)
Sketch Starter Challenge - Open, UE,RW
Appears to have closed
Anything but Square
Sketches in Thyme - MU Layout, E1, T3, RW - (#484)
Always a Sketch - (see below)