Задать вопрос к предложениям: Monday is the first day of the week. ( какой день? ), January is the first month of the year.( какой месяц? )

Which day is the first day of the week? Which month is the first month of the year?

What day is the first of the week?What day is the first of the year?Пожалуйста поставь " Спасибо "