It is a Wee Care gown designed by Tess Ellenwood and is a great easy smock project. Tess has already shared the materials list and pattern on the Smock Along page on Facebook. You will find the list of materials needed and the pattern under 'files' on the Facebook page
You can join the Smock Along at any time, but why not be ready to start when Tess posts the first lesson on February 29th? After all, that is a bonus day, it being a Leap Year!