The following table outlines the list of holidays in January 2018:
| Date | Day | Holiday | Remarks |
| 01 January 2018 | Monday | New Year’s Day | Telangana, Sikkim, Tamil Nadu, Arunachal Pradesh |
| 02 January 2018 | Tuesday | Mannam Jayanthi | Kerala |
| 12 January 2018 | Friday | Birthday of Swami Vivekananda | West Bengal |
| 14 January 2018 | Sunday | Bhogi | Telangana, Andhra Pradesh |
| 14 January 2018 | Sunday | Pongal | Makar Sankranti |
| 14 January 2018 | Sunday | Sankranti | Assam, Telangana, Gujarat |
| 15 January 2018 | Monday | Thiruvalluvar Day | Tamil Nadu |
| 15 January 2018 | Monday | Sankranti | Karnataka, Andhra Pradesh |
| 16 January 2018 | Tuesday | Uzhavar Thirunal | Puducherry, Tamil Nadu |
| 22 January 2018 | Monday | Vasant Panchami | Odisha, Punjab, West Bengal, Tripura |
| 23 January 2018 | Tuesday | Subhas Chandra Birthday | Assam, West Bengal, Odisha |
| 24 January 2018 | Wednesday | Sir Chhotu Ram Jayanti | Haryana |
| 25 January 2018 | Thursday | Statehood Day | Himachal Pradesh |
| 26 January 2018 | Friday | Republic Day | National holiday |
| 31 January 2018 | Wednesday | Me-dam-me-phi | Assam |
| 31 January 2018 | Wednesday | Guru Ravidas Birthday | Haryana, Himachal Pradesh, Punjab |
Bank Holidays in January 2018
The following table outlines bank holidays in January 2018:
| Date | Day | Holiday | States |
| 01 January 2018 | Monday | New Year’s Day | TN, SK, MZ, NL,AR, ML |
| 02 January 2018 | Tuesday | New Year Holiday | MZ |
| 11 January 2018 | Thursday | Missionary Day | MZ |
| 12 January 2018 | Friday | Swami Vivekanand Jayanti | WB |
| 14 January 2018 | Sunday | Sankranti | KA, GJ, SK, TG |
| 14 January 2018 | Sunday | Pongal | PY, TN, AR, AP |
| 15 January 2018 | Monday | Thiruvalluvar Day | TN |
| 15 January 2018 | Monday | Kanuma Panduga | AP |
| 15 January 2018 | Monday | Magh Bihu | AS |
| 16 January 2018 | Tuesday | Uzhavar Thirunal | TN, PY |
| 18 January 2018 | Thursday | Sonal Losar | SK |
| 22 January 2018 | Monday | Vasant Panchami | WB, TR, PB, HR, OR |
| 23 January 2018 | Tuesday | Netaji Subhas Chandra Bose Jayanti | TR, WB, OR |
| 24 January 2018 | Wednesday | Sir Chhotu Ram Jayanti | HR |
| 25 January 2018 | Thursday | State Day | HP |
| 26 January 2018 | Friday | Republic Day | National holiday |
