19 Ramadan is the nineteenth day of the ninth month (Ramadan) of the Islamic calendar.

In the Lunar Hijri calendar, this day is the 255th day of the year.

• 40 AH – Ali ibn Abi Talib (1st Shi'i Imam) was wounded with the sword of Abd al-Rahman ibn Muljam in the morning during Fajr prayer, Kufa^{[1][2][3][4][5][6][7][8]}
• 570 AH – Battle of the Horns of Hama, an Ayyubid victory over the Zengids, which left Saladin in control of Damascus, Baalbek, and Homs^[9]
• The revelation of the whole of Quran to the heart of the Islam Prophet Muhammad (according to the narrations)^[10][11][12]

• 556 AH – Tala'i ibn Ruzzik, minister of Fatimid Caliphate, Arab Egyptian poet^[13][14]
• 665 AH - Abu Shama Makdisi, Syrian Sunni Qāriʾ, Faqīh, historian and writer^[15][16][17]
• 832 AH - Ghiyāth al-Dīn Jamshīd Kāshanī, a Persian astronomer and mathematician^[18][19]
• 1431 AH – Mohammad Hassan Ahmadi Faqih, an Iranian Twelver Shi'a Marja and professor of Qom Seminary^[20][21][22]

• The first Qadr Night of Ramadan according to Shiites, holding an official nightlife worship ceremony called Ehya night in Iran^{[23][24][25][26]}

• 21 Ramadan
• 23 Ramadan
• 13 Rajab