Formulate an answer to this elaborate question: Scottish term and quarter days are the four divisions of the legal year, historically used as the days when contracts and leases would begin and end, servants would be hired or dismissed, and rent, interest on loans, and ministers' stipends would become due, Lammas is one of the Quarter Days, Lammas Day (Anglo-Saxon "hlaf-mas", "loaf-mass"), is a holiday celebrated in some English-speaking countries in the Northern Hemisphere, usually between 1 August and 1 of which month?

September