List of National and Regional Holidays of Sikkim in 2021:
| Date | Day | Holiday |
|---|---|---|
| 2021-01-01 | Friday | New Year’s Day |
| 2021-01-04 | Monday | Barahimizong |
| 2021-01-14 | Thursday | Maghe Sankranti |
| 2021-01-26 | Tuesday | Republic Day |
| 2021-02-12 | Friday | Sonam Lochhar, Losar |
| 2021-02-27 | Saturday | Bhumchu |
| 2021-03-29 | Monday | Holi |
| 2021-04-02 | Friday | Good Friday |
| 2021-04-14 | Wednesday | Dr. B.R Ambedkar Jayanti |
| 2021-04-21 | Wednesday | Ramnawami (Chaite Dasan) |
| 2021-05-14 | Friday | Id-Ul-Fitr |
| 2021-05-16 | Sunday | State Day |
| 2021-05-26 | Wednesday | Saga Dawa, Shyadar Pidar |
| 2021-07-13 | Tuesday | Bhanu Jayanti |
| 2021-07-14 | Wednesday | Drukpa Tshe-zi |
| 2021-07-19 | Monday | Guru Rimpoche’s Thungkar Tshechu |
| 2021-08-08 | Sunday | Tendong Lho Rum Faat |
| 2021-08-15 | Sunday | Independence Day |
| 2021-08-22 | Sunday | Pang-Lhabsol |
| 2021-08-30 | Monday | Janmasthami |
| 2021-09-09 | Thursday | Teej (Haritalika) |
| 2021-09-20 | Monday | Indrajatra |
| 2021-10-02 | Saturday | Gandhi Jayanti |
| 2021-10-05 | Tuesday | Birthday Of Late Nar Bahadur Bhandari, Former Chief Minister Of Sikkim |
| 2021-10-13 | Wednesday | Durga Puja (Dasain) |
| 2021-10-14 | Thursday | Durga Puja (Dasain) |
| 2021-10-15 | Friday | Durga Puja (Dasain) |
| 2021-10-16 | Saturday | Durga Puja (Dasain) |
| 2021-10-17 | Sunday | Durga Puja (Dasain) |
| 2021-10-27 | Wednesday | Lhabab Duechen |
| 2021-11-04 | Thursday | Laxmi Puja / Deepawali |
| 2021-11-05 | Friday | Laxmi Puja / Deepawali |
| 2021-11-06 | Saturday | Laxmi Puja / Deepawali |
| 2021-12-19 | Sunday | Phugal Parim, Teyongsi Sirijunga Sawan Tongnam |
| 2021-12-24 | Friday | Sakewa, Barahimizong |
| 2021-12-25 | Saturday | Christmas |
| 2021-12-30 | Thursday | Tamu Lochar |
2021 Sikkim Public and Government Holidays
