We have prepared a list of Bihar holidays 2021. The list includes all regional, public, and bank holidays in Bihar in 2021. You can refer to the Bihar Holiday List 2021 and plan your leaves accordingly.
| Date | Day | Holiday |
| Jan 26 | Tuesday | Republic Day |
| Mar 22 | Monday | Bihar Diwas |
| Mar 29 | Monday | Holi |
| Mar 30 | Tuesday | Holi |
| Apr 1 | Thursday | Bank Account Closing Day |
| Apr 2 | Friday | Good Friday |
| Apr 14 | Wednesday | Bhimrao Ambedkar Jayanti |
| Apr 21 | Wednesday | Ram Navami |
| May 1 | Saturday | May Day (Shram Diwas) |
| May 14 | Friday | Idul-Fitr (Eid) |
| Jul 21 | Wednesday | Id-Ul-Zuha (Bakri Eid) |
| Aug 15 | Sunday | Independence Day (Swatantrata Diwas) |
| Aug 19 | Thursday | Muharram |
| Aug 30 | Monday | Shri Krishna Janmasthami |
| Oct 2 | Saturday | Mahatma Gandhi Jayanti |
| Oct 13 | Wednesday | Durga Puja (Maha Asthami) |
| Oct 14 | Thursday | Durga Puja (Maha Navami) |
| Oct 15 | Friday | Durga Puja (Vijaya Dashami) |
| Nov 4 | Thursday | Deepavali |
| Nov 10 | Wednesday | Chhath Puja |
| Nov 11 | Thursday | Chhath Puja |
| Dec 25 | Saturday | Christmas |