豊

豊 is archaic — it does not appear in modern Mandarin outside of paleography, etymology discussions, and the occasional personal name. The modern character for 'ritual / ceremony / propriety' is 礼 (simplified) / 禮 (traditional). Use those in any real-world context. 豊 appears only when a writer wants to evoke the original pictographic form, e.g. in scholarly works on oracle-bone script.

On oracle bones, 豊 shows a 豆 (high-stemmed ritual vessel) with offerings — usually two strings of jade — piled on top. From this concrete picture of a sacrificial display the meaning extended to the whole sphere of ritual conduct. When ritual became an abstract category, scribes added 示 (altar) to disambiguate the abstract sense, yielding 禮. 豊 also has a rare fēng reading as a graphic variant of 豐 / 丰 (abundant), but this usage is essentially limited to historical philology.