On all days of the week, Muslims reserve a time in the early morning, midday, afternoon, after sunset and at night to pray. Mosque services are attended on Fridays. Muslim dates of significance are based on the Islamic lunar calendar, and therefore the actual dates vary from year to year. They are marked by the following Islamic calendar months:
- Rabi' al-awwal (Rabi' I)
- Rabi' al-thani (Rabi' II)
- Jumada al-awwal (Jumada I)
- Jumada al-thani (Jumada II)
- Dhu al-Qi'dah
- Dhu al-Hijjah
1 Muharram (Islamic New Year)
10 Muharram (Day of Ashura) - The grandson of Muhammad and his followers were martyred on this day. Sunnis also believe Moses crossed the Red Sea on this day.
12 Rabi al Awal (Moulad: Birth of Prophet Muhammad) - Sunni Muslims observe Moulad on the the 12th of the month.
17 Rabi al Awal (Moulad: Birth of Prophet Muhammad and Mawlid an Nabi for Twelvers) - Shi’a Muslims observe Moulad on the 17th of the month.
27 Rajab (Isra and Mi'raj for majority of Muslims)
15 Sha'ban (Mid-Sha'ban, or Night of Forgiveness), and for Twelvers the birthday of Muhammad al-Mahdi (The Twelfth Imam)
1 Ramadan (First day of fasting) - This is the month that Mohammed received first revelation from God. Muslims fast for 29-30 days to recognise this.
23 Ramadan (Nuzul Al-Qur'an) The most probable day Muhammad received the first verses of the Qur'an. (17 Ramadan in Indonesia and Malaysia)
1 Shawwal (Eid ul-Fitr) - the end of Ramadan
8–13 Dhu al-Hijjah (the Hajj to Mecca)
9 Dhu al-Hijjah (Day of Arafa)
10 Dhu al-Hijjah (Eid al-Adha) - the twelfth month of Islamic lunar calendar signifying completion of the Haj and Abraham’s sacrifice of a sheep.
- 13 Rajab (Birthday of Amir al Muminin Ali Ibn Abi Talib)
- 21 Ramadan (Imam Ali ibn Abi Talib's martyrdom)
- 3 Sha'ban (Birthday of Husayn ibn Ali)
- 9 Rabi ul Awal Eid-e-Zahra s.a (Revenge taken by Mukhtar-al-Saqafi)
- 6 Rajab - Urs of Khwaja Moinuddin Chisti (Generally 6th Day of Every Month is celebrated and observed as Chatthi)
- 11 Rabi Ul Aakhir Urs of Gaus E Aazam Dastagir (Generally 11th Day of Every Month is celebrated and observed as Gyarvi)