In Saint Kitts and Nevis, the Labour Act, Cap. L.1 provides a framework for standard working hours, although it doesn't explicitly define them.

The Act doesn't specify a standard workweek, but it does regulate aspects that indirectly define it. For instance, while there's no set standard, the Act implies a typical workweek of 40 hours. This is inferred from the regulation of overtime pay, which is applicable after 40 hours of work in a week.

Similarly, the Act doesn't dictate a standard workday length. However, considering the 40-hour workweek, a typical workday is likely to be 8 hours.

The Act also guarantees employees a 24-hour uninterrupted rest period in every week. This reinforces the concept of a five-day workweek with two consecutive rest days.

In Saint Kitts and Nevis, any hours worked beyond the standard workweek are considered overtime.

Overtime pay rates vary depending on the day of the week. On weekdays, overtime work is compensated at a rate of one and a half times (1.5x) the regular hourly rate. On Sundays, public holidays, and designated rest days, overtime work attracts double (2x) the regular hourly rate. However, there's an exception: if Sunday is included in a pre-arranged shift schedule, the overtime rate reverts to 1.5x the regular rate.

These regulations are outlined in the Labour Commissioner's directives.

In Saint Kitts and Nevis, specific rest periods and breaks for employees are mandated. Employees are entitled to a 24-hour weekly rest period. This means they must receive at least one day off each week. There are no legal requirements mandating a specific day for the weekly rest period. The employer and employee can agree on a mutually convenient day.

In Saint Kitts and Nevis, there isn't a single law dedicated solely to night shift and weekend work regulations. However, there are relevant provisions scattered across different legislative pieces.

There's no legal definition of "night shift" in Saint Kitts and Nevis. However, some sectors might have industry-specific regulations or collective bargaining agreements that address night shift work. Some sectors might have established practices or agreements for paying a night shift differential, a premium wage on top of the base rate, to compensate for working night hours.

The Labour Act doesn't explicitly prohibit working weekends. However, employees are entitled to one rest day per week, which can be a Sunday or another designated day depending on the employment contract or industry practice. Similar to night shifts, some sectors might have established practices or agreements for paying a weekend premium for working on Saturdays or Sundays.

The Labour Act allows for exceptions to the standard work week and rest day provisions through written agreements between employers and employees or collective bargaining agreements.

For a more comprehensive understanding of specific night shift and weekend work regulations applicable to your situation, it's recommended to consult the Ministry of Labour for the latest information on labour laws and regulations in Saint Kitts and Nevis. Also, carefully review your employment contract for any specific provisions related to night shift or weekend work. For certain industries, there might be additional regulations or sectoral determinations that address night shift and weekend work practices.