Eight hours is considered a day's work in New Hampshire, unless the parties agree otherwise (NH Rev. Stat. Sec. 275:30). Except for employees of employers covered by the federal Fair Labor Standards Act, employees exempt from the New Hampshire minimum wage, and certain seasonal employees of amusement or recreational establishments, state law requires that time-and-a-half be paid for all work in excess of 40 in a week (NH Rev. Stat. Sec. 279:21).
An employer may not ask an employee to work over the legal limit in order to make up time lost by a legal holiday (NH Rev. Stat. Sec. 275:31).
Work on Sundays. Any employer that requires an employee to work on a Sunday must provide the employee with 24 consecutive hours off in the following 6 days, or may face a fine (NH Rev. Stat. Sec. 275:32).