应该是 If my birthday by solar calendar is on a weekday when/on which I have to work 因为A weekday is any of the days of the week except Saturday and Sunday.
帮忙看看这个句子有没有语法错误 If my solar calendar birthday is weekda
应该是 If my birthday by solar calendar is on a weekday when/on which I have to work 因为A weekday is any of the days of the week except Saturday and Sunday.