What are symbols of St Patrick's day?

Answer 1

The symbol of St. Patrick is a shamrock of three leafs, since the saint used it to preach the Gospel in Ireland, and particularly, to explain the Christian doctrine of the Holy Trinity.

Also, the British (more English, than others) tradition maintains a red saltire (an x-shaped cross) on the white background to symbolise St. Patrick's cross. Thus, it is reflected in the UK flag, where one can find the red saltire among the symbols of England (St. George's Standard) and Scotland (St. Andrew's Standard). HOWEVER, flags with cross-shaped symbols on are accorded ONLY to commemorate martyres, and since St. Patrick wasn't one, the whole "St. Patrick's cross" tradition is, evidently, made-up to have something representing Ireland, formerly an English province, on the British Union flag.
Saint patricks symbol is a green clover

Answer 2

the shamrock, the color green, "kiss me im Irish", leprochans, rainbows, pot of gold, beer, the Celtic cross

Answer 3

Leprechons, shamrocks, green, pots of gold,