Yawm al-Asir (Prisoner Day) is an annual day of solidarity observed in many Muslim countries and communities to honor prisoners of conscience, political detainees, and those unjustly imprisoned. While not a religious festival with specific rituals, it reflects the Islamic emphasis on justice (Adl) and the dignity of all human beings. Islam places tremendous importance on justice, even for enemies: "O you who have believed, be persistently standing firm for Allah, witnesses in justice, and do not let the hatred of a people prevent you from being just. Be just; that is nearer to righteousness" (5:8). The day focuses attention on prisoners who have been denied fair trials, those suffering from torture or inhumane conditions, and families affected by incarceration. It calls upon governments and societies to uphold the rights of prisoners according to Islamic law and international standards, which require humane treatment, access to family, and fair judicial processes. The Prophet Muhammad (peace be upon him) taught: "Feed the hungry, visit the sick, and free the captive" (Bukhari). Yawm al-Asir reminds Muslims of their responsibility to advocate for justice and mercy for all people, recognizing that human freedom and dignity are gifts from Allah that must be protected. The concept of justice in Islam is comprehensive. It includes justice in the courtroom, justice in society, and justice in personal conduct. The Quran commands believers to be just even if it is against themselves or their relatives (4:135). This principle applies to the treatment of prisoners. Islam teaches that prisoners, whether convicted or awaiting trial, retain their human dignity. They have rights to food, shelter, clothing, medical care, and humane treatment. They have the right to family visits and to practice their religion. The Prophet said: "The one who is unjust to a person under his authority will not enter Paradise" (Muslim). This applies to those in positions of authority over prisoners. Yawm al-Asir also focuses on prisoners of conscience,those imprisoned for their beliefs, for speaking truth to power, or for advocating for justice. Islam teaches that freedom of belief is a fundamental right: "There is no compulsion in religion" (2:256). Those who are oppressed for their beliefs are to be supported and defended. The day also highlights the families of prisoners, who often suffer hardship, stigma, and isolation. The believer supports these families, visiting them, providing for their needs, and offering emotional support. The Prophet said: "Whoever relieves a believer's distress in this world, Allah will relieve his distress on the Day of Judgment" (Muslim). For believers, Yawm al-Asir is a call to action. They advocate for justice, support prisoners and their families, and work to reform unjust systems. They remember the Prophet's teaching: "Help your brother, whether he is the oppressor or the oppressed." When asked how to help the oppressor, he said: "By preventing him from oppressing" (Bukhari). The ultimate justice is with Allah, who will judge all oppressors and compensate all victims on the Day of Judgment. The believer works for justice in this life, trusting that Allah will complete what is beyond human capacity. Yawm al-Asir reminds believers that their responsibility extends to all who are oppressed, regardless of their faith or background. The Prophet said: "Allah will not be merciful to those who are not merciful to people" (Bukhari). The believer shows mercy to prisoners, advocates for their rights, and works for a world where justice prevails.