Flextime (or flexitime, flexi-time, originally erived from the German word Gleitzeit which literally means 'sliding time') is a variable work schedule, in contrast to traditional work arrangements requiring employees to work a standard 9am to 5pm day. Under flexitime, there is typically a core period of the day when employees are expected to be at work (for example, between 10 am and 4pm), whilst the rest of the working day is "flexitime", in which employees can choose when they work, subject to achieving total daily, weekly or monthly hours in the region of what the employer expects, and subject to the necessary work being done.