2026 Mustard Day T-Shirt (Mustard World Tour) T-Shirts You'd have to be in-SEINE

You'd have to be in-SEINE to pass up these fabulous French mustards

we'll substitute another of our favorite mustards of equal or greater value

This vinegary coarse mustard goes well in meat dishes

so it figures that doing a puzzle of people dressed as ducks playing in the water is going to be one of the most confusing and stress-relieving things ever

2026 Mustard Day T-Shirt (Mustard World Tour) T-Shirts You'd have to be in-SEINECelebrate National Mustard Day 2026 in style with an official, limited edition Mustard Day T shirt! 100% cotton. The shirt is light yellow. The front depicts an illustrated mustard bottle holding a purple guitar. Around the graphic are the words: MUSTARD WORLD TOUR National Mustard Day 2026