HSTU Calendar 2021
List of Holidays - 2021
| Subject | Date | |
| 1 | Saraswati Puja (Sreepanchami) | 16 February |
| 2 | Shahid Dibash & International Mother Language Day | 21 February |
| 3 | Sab-e-Meraj* | 12 March |
| 4 | Birthday of Father of the Nation Bangabandhu Sheikh Mujibur Rahman |
17 March |
| 5 | Independence & National Day | 26 March |
| 6 | Sab-e-Barat* | 29 March |
| 7 | Bangla Nababarsha | 14 April |
| 8 | May Day | 1 May |
| 9 | Holy Ramadan, Sab-e-Qadar & Eid-ul-Fitr*, Summer Vaction | 02 May- 18 May |
| 10 | Buddha Purnima* | 26 May |
| 11 | Eid-ul-Azha* | 18 July- 27 July |
| 12 | Natinal Mourning Day | 15 August |
| 13 | Mohorrom* (Asura) | 19 August |
| 14 | Janmastami | 30 August |
| 15 | Akheri Chahar Shomba* | 06 October |
| 16 | Durgapuja | 11 October- 15 October |
| 17 | Eid-e-Miladun-Nabi(SM)* | 19 October |
| 18 | Fateha-e-Eajdaham | 17 November |
| 19 | Shaheed Intellectuals' Day | 14 December (class off) |
| 20 | Victory Day | 16 December |
| 21 | Christmas Day, Winter Vacation | 25 December- 31 December |