The 22nd of each month will become a "No Violence Day in Detroit" following a proclamation by Mayor Dave Bing.
Bing is expected to issue the proclamation Wednesday evening to the United Communities of America at Fellowship Chapel on the city's northwest side.
Concerns about violent crime in Detroit are rising.
Through Aug. 12, the number of homicides is one fewer than the 221 committed over the same period last year. Assault, larceny, rape and car theft reports are up.
The state police and Wayne County sheriff's office are assisting Detroit police on patrols in some city neighborhoods.
The United Communities of America helped organize a January "Thou Shall Not Kill" motorcade led by hearses through crime-ridden neighborhoods to call an end to killings in the city.