While on business in New York, normal business courtesies should be observed, although New Yorkers are less formal than Europeans and usually use first names. Both men and women in finance usually wear suits; in other industries, attire might be much less formal. Punctuality for business meetings and appointments is naturally expected. Business hours are officially Monday to Friday 0900-1730, although an extended working day is very common in certain sectors and it is not unusual for people to be working well into the night or over the weekend. Business meetings frequently take place over breakfast, brunch and lunch. For lunch meetings, alcohol, in moderation, is acceptable.