Explanation:

Zero hour is an Indian innovation in field of parliamentary procedures and has been in existence since 1962. The term “Zero Hour” is not formally recognised in parliamentary procedure. However, Speaker, Lok Sabha / Chairman, Rajya Sabha may allow or decline a Member to raise a matter of importance.The time immediately following the Question Hour has come to be known as “Zero Hour”. It starts at around 12 noon (hence the name) and members can, with prior notice to the Speaker, raise issues of importance during this time. Typically, discussions on important Bills, the Budget, and other issues of national importance take place from 2 pm onwards.