| 1/2/1978, Mon | New Year's Day: Actual Observance Day |
- Note
- A statutory public holiday (Awal Tahun Masihi).
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| 2/7/1978, Tue | Chinese New Year |
- Note
- A statutory public holiday (Tahun Baru Cina).
|
| 2/20/1978, Mon | Prophet Muhammad's Birthday |
- Note
- A statutory public holiday (Maulud Nabi Muhammad SAW).
|
| 2/23/1978, Thu | National Day of Brunei Darussalam |
- Note
- A statutory public holiday (Hari Kebangsaan).
|
| 5/31/1978, Wed | Royal Brunei Armed Forces Day |
- Note
- A statutory public holiday.
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| 7/3/1978, Mon | Isra' and Mi'raj |
- Note
- A statutory public holiday commemorating the Prophet Muhammad's night journey and ascension.
|
| 7/15/1978, 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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| 8/5/1978, Sat | First Day of Ramadan |
- Note
- A statutory public holiday (Awal Ramadan).
|
| 8/21/1978, Mon | Nuzul Al-Quran |
- Note
- A statutory public holiday commemorating the revelation of the Qur'an.
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| 9/4/1978, Mon | Hari Raya Aidil Fitri (Day 1) |
- Note
- A statutory public holiday.
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| 9/5/1978, Tue | Hari Raya Aidil Fitri (Day 2) |
- Note
- A statutory public holiday.
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| 9/6/1978, Wed | Hari Raya Aidil Fitri (Day 3) |
- Note
- A statutory public holiday.
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| 11/11/1978, Sat | Hari Raya Aidil Adha |
- Note
- A statutory public holiday.
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| 12/2/1978, Sat | Islamic New Year |
- Note
- A statutory public holiday.
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| 12/25/1978, Mon | Christmas Day |
- Note
- A statutory public holiday.
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