Dear Anusoni,
Every engagement of the services of a person by another for hire or reward will automatically become employment if it creates the employer-employee relationship between them, which is otherwise called the contract of employment or contract of service. Therefore, notwithstanding its duration, it continues to be a contract of employment until its termination as mutually agreed. Any such ad hoc contract of employment lasting only for a mutually agreed period of time is also called a Fixed-Term Contract of Employment, which is not different from a regular/normal contract of employment other than the terminal clause. In other words, all other rights and obligations of the parties to the contract remain the same during its subsistence.