They wear whatever they want to wear. There is no prescribed uniform.
No it isn't but not many people do it.
April 23 is St Georges day
Green
Many people do, but not everybody.
orange, green and white
..yes
* England - St. Georges day * Wales - St. Davids day * Scotland - St. Andrews day * Northen Ireland - St. Patricks day
Yes
The first of March is St Savid's day. St David is the patron saint of Wales. The leek, like the daffodil, is a symbol of Wales. So, many people wear a Welsh symbol on their patron saint's feast day, in the same way that many people Irish people wear shamrock on St Patrick's day.
Shamrocks are not orange.
It is common to wear green on St. Patrick's Day.
usually people wear something green. or they have a shamrock on somewhere