75 Spirit Day Ideas - SignUpGenius Work Out Day - Have everyone wear his/her exercise clothes for the day. Love this I'm trying out for student counsel and we need spirit day ideas for part of our questions, so this helped a lot because I couldn't think of a thing before this. Holiday Day - Dress Author: Kayla Rutledge Have Some Fun With Theme Days – NPSTW Mar 10, 2016Have Some Fun With Theme Days. Dress Down or Denim Day – Many departments allow staff to wear jeans all week during NPSTW. Hawaiian Shirt Day – Have a contest for the best one! I Need a Vacation! Day – Wear your favorite shirt/top from your favorite vacation spot or country.