Zero Hour is a term used in the parliamentary affairs of India. It is a period during which Members of Parliament (MPs) can raise important issues that require immediate attention from the government. The Zero Hour proceedings start immediately after the Question Hour in the Lok Sabha and Rajya Sabha. MPs must give notice before 10 am to the Speaker/Chairman on the day of the sitting, stating the subject they wish to raise in the House. However, the Speaker, Lok Sabha/Chairman, Rajya Sabha may allow or decline a Member to raise a matter of importance.

Zero Hour is not mentioned in the Rules of Procedure, thus it is an informal device available to MPs to raise matters without any notice 10 days in advance. The discussions in both houses during Zero Hour take place according to the rules of the Parliament. Zero Hour provides a platform for MPs to raise important matters that need the immediate attention of the government. Through Zero Hour, MPs can highlight issues that are not listed for discussion in the days agenda and initiate discussions on them. This makes Zero Hour an essential tool for MPs to hold the government accountable for its actions.