This project explores how geometric illustration can serve as a visual system for cultural storytelling. Inspired by Taiwanese festivals, each stamp interprets a ritual moment through simplified forms, symbolic objects, and a shared compositional grid. While every festival maintains its own color and imagery, all stamps remain connected through consistent geometry and visual rhythm. Designed as a commemorative stamp, the series transforms everyday cultural practices into collectible artifacts—promoting Taiwan not through landmarks or slogans, but through lived traditions and shared memory.