| 1/1/1980, Tue | New Year's Day |
- Note
- A statutory public holiday (Awal Tahun Masihi).
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| 1/30/1980, Wed | Prophet Muhammad's Birthday |
- Note
- A statutory public holiday (Maulud Nabi Muhammad SAW).
|
| 2/16/1980, Sat | Chinese New Year |
- Note
- A statutory public holiday (Tahun Baru Cina).
|
| 2/23/1980, Sat | National Day of Brunei Darussalam |
- Note
- A statutory public holiday (Hari Kebangsaan).
|
| 5/31/1980, Sat | Royal Brunei Armed Forces Day |
- Note
- A statutory public holiday.
|
| 6/11/1980, Wed | Isra' and Mi'raj |
- Note
- A statutory public holiday commemorating the Prophet Muhammad's night journey and ascension.
|
| 7/14/1980, Mon | First Day of Ramadan |
- Note
- A statutory public holiday (Awal Ramadan).
|
| 7/15/1980, Tue | 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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| 7/30/1980, Wed | Nuzul Al-Quran |
- Note
- A statutory public holiday commemorating the revelation of the Qur'an.
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| 8/13/1980, Wed | Hari Raya Aidil Fitri (Day 1) |
- Note
- A statutory public holiday.
|
| 8/14/1980, Thu | Hari Raya Aidil Fitri (Day 2) |
- Note
- A statutory public holiday.
|
| 8/18/1980, Mon | Hari Raya Aidil Fitri (Day 3): Actual Observance Day |
- Note
- A statutory public holiday.
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| 10/20/1980, Mon | Hari Raya Aidil Adha |
- Note
- A statutory public holiday.
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| 11/10/1980, Mon | Islamic New Year: Actual Observance Day |
- Note
- A statutory public holiday.
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| 12/25/1980, Thu | Christmas Day |
- Note
- A statutory public holiday.
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