As we know that post office remains closed on sunday and postal holidays. but parcel delivery on sundays and holidays is started in delhi by nodal delivery centre post offices and it is working fine as per report.
Now, postal directorate has ordered to NDC post offices of Chennai, Mumbai, Kolkata, Bengluru and Hyderabad to start parcel delivery.
If you are living in above listed cities then it is good news that you will receive parcel on sundays and holidays as well as week days through NDC post offices.