This document describes a reusable component called the Date for Day Mapplet created by Divya Sethuraman on March 5, 2008. The mapplet takes in a date, day of the week, and indicator to calculate dates related to that day of the week, such as the first or last Friday of the current month. It provides code for the reusable component and test mappings and workflows. Test results confirm it successfully calculates the requested dates.