| 1/1/1975, Wed | New Year's Day |
- Note
- A statutory public holiday (Awal Tahun Masihi).
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| 1/14/1975, Tue | Islamic New Year |
- Note
- A statutory public holiday.
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| 2/11/1975, Tue | Chinese New Year |
- Note
- A statutory public holiday (Tahun Baru Cina).
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| 2/24/1975, Mon | National Day of Brunei Darussalam: Actual Observance Day |
- Note
- A statutory public holiday (Hari Kebangsaan).
|
| 3/25/1975, Tue | Prophet Muhammad's Birthday |
- Note
- A statutory public holiday (Maulud Nabi Muhammad SAW).
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| 5/31/1975, Sat | Royal Brunei Armed Forces Day |
- Note
- A statutory public holiday.
|
| 7/15/1975, Tue | H.M. The Sultan's Birthday |
- Note
- A statutory public holiday. H.M. Sultan Haji Hassanal Bolkiah's Birthday (born 15 July 1946).
|
| 8/5/1975, Tue | Isra' and Mi'raj |
- Note
- A statutory public holiday commemorating the Prophet Muhammad's night journey and ascension.
|
| 9/8/1975, Mon | First Day of Ramadan: Actual Observance Day |
- Note
- A statutory public holiday (Awal Ramadan).
|
| 9/23/1975, Tue | Nuzul Al-Quran |
- Note
- A statutory public holiday commemorating the revelation of the Qur'an.
|
| 10/7/1975, Tue | Hari Raya Aidil Fitri (Day 1) |
- Note
- A statutory public holiday.
|
| 10/8/1975, Wed | Hari Raya Aidil Fitri (Day 2) |
- Note
- A statutory public holiday.
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| 10/9/1975, Thu | Hari Raya Aidil Fitri (Day 3) |
- Note
- A statutory public holiday.
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| 12/15/1975, Mon | Hari Raya Aidil Adha: Actual Observance Day |
- Note
- A statutory public holiday.
|
| 12/25/1975, Thu | Christmas Day |
- Note
- A statutory public holiday.
|