Article in English: Unless you want to, you don't have to wear a sweater with a giant shamrock on it. (Though that would certainly help you stand out.) The great thing about this holiday is you are free to go as subtle or as wild as you like. St. Patrick's Day t-shirts have been a common article of clothing to wear proudly. Consider the following suggestions when picking out something to wear:  An all green t-shirt with optional Irish-related sayings, for example, "Kiss me, I'm Irish!" Note that no real Irish person over the age of ten would be caught dead in one of these. T-shirts with Irish beer monikers such as Harp or Guinness are more acceptable For those who are feeling particularly festive, try buying or making a leprechaun costume, replete with white stockings, green top hat and fake (or real!) red beard. If you're working on March 17th, you can still get into the festive spirit by incorporating a little green into your work attire. Try a green-striped polo or collared shirt, a green or shamrock-dotted tie, or green socks and undies for the closet St. Paddy's Day fans. Buttons, pins and jewelry are all great ways to dress up an outfit. On St. Patrick's Day, they become ways to express the fun side of fashion. Nothing is too gaudy or outlandish. Buttons with clever (or not so clever) sayings are also encouraged. Small shamrock pins are a great and subtle way to express your support of the holiday.  It is a tradition in Ireland for all attending parades and generally celebrating to wear a small collection of Shamrock fastened by a clothespin to your top (in the same place as a badge would be worn). Dying your hair or your pet's fur bright green is also a great way to stand out. Be sure to use a non-toxic dye. It's also common to see kids (and sometimes adults) with their faces painted on St. Patrick's Day, particularly if they're attending the parade. Cute shamrocks on the cheeks are a popular option, along with full-faced Irish flags of green, white and orange. The Irish have their own distinct dialect of the English...

Summary in Chinese:
穿成绿色。 装饰品。 学习一些爱尔兰语单词或短语。 学习爱尔兰舞。 学习圣帕特里克节的历史。