| 1/2/1989, Mon | New Year's Day: Actual Observance Day |
- Note
- A statutory public holiday (Awal Tahun Masihi).
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| 2/6/1989, Mon | Chinese New Year |
- Note
- A statutory public holiday (Tahun Baru Cina).
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| 2/23/1989, Thu | National Day of Brunei Darussalam |
- Note
- A statutory public holiday (Hari Kebangsaan).
|
| 3/6/1989, Mon | Isra' and Mi'raj: Actual Observance Day |
- Note
- A statutory public holiday commemorating the Prophet Muhammad's night journey and ascension.
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| 4/10/1989, Mon | First Day of Ramadan: Actual Observance Day |
- Note
- A statutory public holiday (Awal Ramadan).
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| 4/24/1989, Mon | Nuzul Al-Quran: Actual Observance Day |
- Note
- A statutory public holiday commemorating the revelation of the Qur'an.
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| 5/8/1989, Mon | Hari Raya Aidil Fitri (Day 1): Actual Observance Day |
- Note
- A statutory public holiday.
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| 5/8/1989, Mon | Hari Raya Aidil Fitri (Day 2) |
- Note
- A statutory public holiday.
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| 5/9/1989, Tue | Hari Raya Aidil Fitri (Day 3) |
- Note
- A statutory public holiday.
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| 5/31/1989, Wed | Royal Brunei Armed Forces Day |
- Note
- A statutory public holiday.
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| 7/15/1989, Sat | 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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| 7/17/1989, Mon | Hari Raya Aidil Adha: Actual Observance Day |
- Note
- A statutory public holiday.
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| 8/7/1989, Mon | Islamic New Year: Actual Observance Day |
- Note
- A statutory public holiday.
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| 10/16/1989, Mon | Prophet Muhammad's Birthday: Actual Observance Day |
- Note
- A statutory public holiday (Maulud Nabi Muhammad SAW).
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| 12/25/1989, Mon | Christmas Day |
- Note
- A statutory public holiday.
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