spirit week

English

Noun

spirit week (plural spirit weeks)

1. (US) The week leading up to homecoming, during which school students dress up in unusual themed clothing.
   • 2003, Murray Baker, The Debt-Free Graduate:

     Student councils also offer a smorgasbord of programs, ranging from spirit weeks and Homecoming days to charity events. You've already paid for many of these activities through your student fees, so get your money's worth by participating.