Regarding Contract and Notice Period

Sanwar has explained correctly. It depends on company's leave policies. Also Everyone need to serve notice period of months as given in employment contract. So completing your contract tenure is actually a compulsion but you have to official give notice to employer that you want to leave the organisation. It depends on employer only if they can relieve you from your roles and responsibilities even before 2 months.

We must have to respect policies for regulation purpose. So if you have worked so hard, you can request them for early release but you have no right. It will just depend on business need and your relationship with organisation if they think for early release. At the end organisation is also on a bit loss while loosing an employee. So try negotiate politely.