With the advent of the internet and its effect on the global market, never has the need for companies to manage work in different time zones been so apparent. Smart companies embrace this by allowing their employees greater flexibility in when they work. This allows for more work to be taken on, but it also means that the guarantee of Saturday and Sunday weekends becomes a thing of the past.
This type of working philosophy means that an employee who needs to work during the night or on a weekend, might not need to work during the day. They can spend that time instead with their family or pursue other goals they might have. However this can also mean that work is put upon employees unexpectedly due to the nature of working as and when its needed and its less structured format. Whether this is a good or bad thing depends largely on how work much your business and your employees want to, and actually can take on.