| 1/4/2021, Mon | New Year's Day: Actual Observance Day |
- Note
- A statutory public holiday (Awal Tahun Masihi).
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| 2/15/2021, Mon | Chinese New Year: Actual Observance Day |
- Note
- A statutory public holiday (Tahun Baru Cina).
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| 2/23/2021, Tue | National Day of Brunei Darussalam |
- Note
- A statutory public holiday (Hari Kebangsaan).
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| 3/11/2021, Thu | Isra' and Mi'raj |
- Note
- A statutory public holiday commemorating the Prophet Muhammad's night journey and ascension.
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| 4/13/2021, Tue | First Day of Ramadan |
- Note
- A statutory public holiday (Awal Ramadan).
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| 4/29/2021, Thu | Nuzul Al-Quran |
- Note
- A statutory public holiday commemorating the revelation of the Qur'an.
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| 5/13/2021, Thu | Hari Raya Aidil Fitri (Day 1) |
- Note
- A statutory public holiday.
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| 5/15/2021, Sat | Hari Raya Aidil Fitri (Day 3) |
- Note
- A statutory public holiday.
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| 5/17/2021, Mon | Hari Raya Aidil Fitri (Day 2): Actual Observance Day |
- Note
- A statutory public holiday.
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| 5/31/2021, Mon | Royal Brunei Armed Forces Day |
- Note
- A statutory public holiday.
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| 7/15/2021, Thu | H.M. The Sultan's Birthday |
- Note
- A statutory public holiday. H.M. Sultan Haji Hassanal Bolkiah's Birthday (born 15 July 1946).
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| 7/20/2021, Tue | Hari Raya Aidil Adha |
- Note
- A statutory public holiday.
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| 8/10/2021, Tue | Islamic New Year |
- Note
- A statutory public holiday.
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| 10/19/2021, Tue | Prophet Muhammad's Birthday |
- Note
- A statutory public holiday (Maulud Nabi Muhammad SAW).
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| 12/25/2021, Sat | Christmas Day |
- Note
- A statutory public holiday.
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