英语翻译1句“I am wearing my dress shoes for my uncle's birthday p

英语翻译
1句
“I am wearing my dress shoes for my uncle's birthday party.They aren't very comfortable.But today is a special day.”
此句最后一句开头为何用But?
2句
So the students in the countryside go to school for no more than six months every year-half in summer,half in winter.They work on their family farms during the other months.
翻译此句
thank you very much