Following is list of days of celebration/mourning/remembrance as observed by Shi'a Twelver Muslims:
| List of celebration/mourning/remembrance as observed by Shi'a Twelver Muslims |
| Date | Type | Event(celebration/mourning/remembrance) | Remark/Notes |
| Muharram |
| 2 | M | Arrival of Imam Husain(a.s.) in Karabala, 61 A.H. | |
| 7 | M | Water supply to Imam Husain(a.s.) & his companions was stopped in Karbala | |
| 9 | M | Tassooa/Shab-e-A'ashoora | Night of A'ashoora |
| 10 | M | A'ashoora | Martyrdom of Imam Hussain(a.s.) & his companions, 61 A.H. |
| M | Shaam-e-Ghariba | Evening of A'ashoora) |
| 12 | M | Siyyum of Shaheed-e-Karbala | 3rd day of A'ashoora |
| 17 | R | Aam-ul-feel | Abraha attacked on Ka'aba |
| 18 | R | Qibla was changed from Bait-ul-Muqqaddas to Ka'bah, 2 A.H. | |
| 20 | M | 10th day of Ashura | |
| 25 | M | Martyrdom of Imam Zain-ul-Abedin(a.s.), 95 A.H. | |
| 29/30 | M | 20th day of Ashura | |
| Safar |
| 1 | R | Battle of Sif'feen, 37 A.H. | |
| 7 | R | Birth of Imam Musa-e-Kazim(a.s.), 128 A.H. | Due to mourining span it is not celebrated. |
| 10 | M | Wafat of Janab-e-Sakina(s.a.) | |
| M | 30th day of Ashura | |
| R | Battle of Naherwaan | |
| 12 | R | Birth of Janab-e-Salman-e-Farsi | |
| 17 | M | Martyrdom of Imam Ali Reza(a.s.), 203 A.H. | According to some scholars 29 Safar or 23rd Zul'Hijjah |
| 20 | M | Chehlum/Ar'baeen | 40th day of Ashura |
| 24 | M | Wafat of Hazrat Rasool-e-Khuda(s.a.w.a), 11 A.H. | |
| M | Martyrdom of Imam Hasan(a.s.), 50 A.H. | |
| Rabi-al-awwal |
| 1 | R | Hijrat of Holy Prophet(s.a.w.a.) | |
| 5 | R | Wafat of Janab-e-Masooma-e-Qum(s.a.) | |
| 8 | M | Martyrdom of Imam Hasan Askari(a.s.), 260 A.H. |
| 9 | C | Eid-e-Zahra | |
| C | Imamat day of Imam-e-Zaman(a.t.f.s.) | |
| 10 | R | Wafat of Janab-e-Abd'al Muttalib | |
| 14 | R | Yazid(l.a.) was killed | |
| 15 | R | First mosque (Quba) was established, 1 A.H. | |
| 17 | C | Birth of Hazrat Rasool-e-Khuda(s.a.w.a), 53 B.H. | |
| C | Birth of Imam Jafar-as-Sadiq(a.s.), 83 A.H. | |
| 18 | R | Birth of Janab-e-Umm-e-Kulsum(s.a.) Bint-e-Ali(a.s.) | |
| Rabi-al-aakhir |
| 8 | C | Birth of Imam Hasan Askari(a.s.), 232 A.H. | |
| Jamadi-al-awwal |
| 1 | R | Death of Harun Rashid | |
| 10 | R | Battle of Camel(Jamel) | |
| 14 | M | Martyrdom of Janab-e-Fatima-az-Zahra(s.a.), 11 A.H. | According to some scholars on 13th of same month or 3rd Jamadi-ul-Aakhir |
| 15 | C | Birth of Imam Zain-ul-Abedin(a.s), 37 A.H. | According to some scholars on 15th of Jamadi-ul-Aakhir or 5th Shabaan |
| Jamadi-al-aakhir |
| 20 | C | Birth of Janab-e-Fatima-az-Zahra(s.a.), 8 B.H. | |
| 26 | M | Martyrdom of Imam Ali Naqi(a.s) | According to some scholars on 3rd of Rajab |
| Rajab |
| 1 | C | Birth of Imam Mohammed Baqir(a.s.), 57 A.H. | |
| 7 | C | Birth of Hazrat Abbas(a.s.), 36 A.H. | According to some scholars on 4th Shabaan |
| 10 | C | Birth of Imam Mohammad Taqi(a.s.), 195 A.H. | |
| 13 | C | Birth of Imam Ali(a.s.), 23 B.H. | |
| 15 | M | Martyrdom of Imam Jafar-as-Sadiq(a.s.) | |
| 18 | R | Wafat Hazrat Ibrahim(a.s.) | |
| 20 | C | Birth of Janab-e-Sakina(s.a) | |
| 22 | C | Koo'nda | Niyaz/Nazr of Imam Jafar-as-Sadiq(a.s.) |
| 24 | R | Birth of Janab-e-Ali-Asgar(a.s.) | |
| 25 | M | Martyrdom of Imam Musa-e-Kazim(a.s.) | |
| 26 | R | Wafat of Hazrat Abu Talib(a.s.) | |
| 27 | C | Eid-e-Meraj/Yaum-e-Be'asat | |
| 28 | M | Imam Hussain(a.s.) started from Madina to Karbala, 60 A.H. | |
| Shaban |
| 1 | C | Birth of Janab-e-Zainab(s.a.), 6 A.H. | |
| 3 | C | Birth of Imam Hussain(a.s.), 4 A.H. | |
| 5 | R | Birth of Janab-e-Ali Akbar (a.s.) | |
| 7 | R | Birth of Janab-e-Qasim(a.s.) | |
| 14 | R | Shab-e-Ba'raat | |
| 15 | C | Birth of Imam-e-Zaman(a.t.f.s.) | |
| Ramzan |
| 4 | R | Nuzool Taurait | |
| 10 | R | Wafat of Janab-e-Khadijat-ul-Kubra(s.a.) | |
| 12 | R | Nuzool Injeel | |
| 15 | R | Birth of Imam Hasan(a.s.) | |
| 17 | R | Battle of Badr, first battle of Islam | |
| 18 | R | Shab-e-Qadr | |
| R | Nuzool Zuboor | |
| 19 | M | Yaum-e-Zarbat | Imam Ali(a.s) was wounded), 40 A.H. |
| 20 | R | Shab-e-Qadr | |
| R | Fateh Mecca | |
| 21 | M | Martyrdom of Imam Ali(a.s.), 40 A.H. | |
| 22 | R | Shab-e-Qadr | |
| R | Nuzool Quran | |
| xx | R | Jumaatulwida | last Juma of Ramzan |
| Shawwal |
| 1 | C | Eid-ul-Fitr | |
| 2 | R | Battle of Khandak(Trench) | |
| 8 | M | Yaum-e-Gham | Janat-ul-Baqi destroyed by Ibn-e-Saud(l.a.) |
| 9 | R | Janab-e-Khatija Married to Prophet(s.a.w.a.) | |
| 10 | R | Ghaibat-e-Kubra-e-Imam-e-Zaman(a.t.f.s.) | |
| 15 | R | Shahadat of Hazrat Hamzah(a.s.) in Uhud 3 A.H. | According to Mafatih & Allama Jawadi |
| 29 | R | Birth of Hazrat Abu Talib(a.s.) | |
| Zilqad |
| 1 | R | Birth of Janab-e-Masoom-e-Qum(s.a.) | |
| 6 | R | Treaty of Hudaibiya was executed, 6 A.H. | |
| 11 | C | Birth of Imam Ali Reza(a.s.), 148 A.H. | |
| 25 | R | Eid-e-Dahwool-e-Arz(The earth was spread) | |
| R | Khana Ka'ba was established |
| R | Birth of Hazrat Ibrahim(a.s.) |
| R | Birth of Hazrat Isa(a.s.) |
| 29 | M | Martyrdom of Imam Mohammad Taqi(a.s.), 220 A.H. | |
| Zilhaj |
| 1 | R | Sayeda Fatima married to Hazrat Ali(a.s.) | |
| 3 | R | Renunciation of Hazrat Adam(a.s.) accepted | |
| 7 | M | Martyrdom of Imam Mohammad Baqir(a.s.) | |
| 8 | M | Imam Hussain(a.s.) started from Mecca to Karbala, 60 A.H. | |
| 9 | R | Day of Arafah | |
| M | Martyrdom of Janab-e-Muslim ibn Aqil(a.s.) |
| 10 | C | Eid-uz-Zuha | |
| 15 | C | Birth of Imam Ali Naqi(a.s), 212 A.H. | According to some scholars on 2nd Rajab or 5th Rajab |
| 16 | M | Wafat of Janab-e-Zainab(s.a.) | |
| 18 | C | Eid-e-Ghadeer | |
| 23 | R | Martyrdom of Farzand-e-Muslim(a.s.), 60 A.H. | |
| 24 | C | Eid-e-Mubahila | |
| 27 | R | Wafat of Janab-e-Meesum-e-Tammaar | |
Type symbols: C = Celebration, M = Mourning, R = Remembrance;
Source: Jaffery Welfare Trust: 2009 Islamic calendar & various other calendars and almanacs. |
