| 1/1/2005, Sat | New Year's Day |
- Note
- A statutory public holiday (Awal Tahun Masihi).
|
| 1/24/2005, Mon | Hari Raya Aidil Adha: Actual Observance Day |
- Note
- A statutory public holiday.
|
| 2/9/2005, Wed | Chinese New Year |
- Note
- A statutory public holiday (Tahun Baru Cina).
|
| 2/10/2005, Thu | Islamic New Year |
- Note
- A statutory public holiday.
|
| 2/23/2005, Wed | National Day of Brunei Darussalam |
- Note
- A statutory public holiday (Hari Kebangsaan).
|
| 4/21/2005, Thu | Prophet Muhammad's Birthday |
- Note
- A statutory public holiday (Maulud Nabi Muhammad SAW).
|
| 5/31/2005, Tue | Royal Brunei Armed Forces Day |
- Note
- A statutory public holiday.
|
| 7/18/2005, Mon | H.M. The Sultan's Birthday: Actual Observance Day |
- Note
- A statutory public holiday. H.M. Sultan Haji Hassanal Bolkiah's Birthday (born 15 July 1946).
|
| 9/1/2005, Thu | Isra' and Mi'raj |
- Note
- A statutory public holiday commemorating the Prophet Muhammad's night journey and ascension.
|
| 10/4/2005, Tue | First Day of Ramadan |
- Note
- A statutory public holiday (Awal Ramadan).
|
| 10/20/2005, Thu | Nuzul Al-Quran |
- Note
- A statutory public holiday commemorating the revelation of the Qur'an.
|
| 11/3/2005, Thu | Hari Raya Aidil Fitri (Day 1) |
- Note
- A statutory public holiday.
|
| 11/5/2005, Sat | Hari Raya Aidil Fitri (Day 3) |
- Note
- A statutory public holiday.
|
| 11/7/2005, Mon | Hari Raya Aidil Fitri (Day 2): Actual Observance Day |
- Note
- A statutory public holiday.
|
| 12/26/2005, Mon | Christmas Day: Actual Observance Day |
- Note
- A statutory public holiday.
|