July 24, 1967: The Beatles pay for a full page advertisement in a British newspaper, which states, "The law against marijuana is immoral in principle and unworkable in practice." The ad calls for the legalization of marijuana possession, release of all prisoners on marijuana possession charges and government research into medical uses.

July 23, 1985: Tulio Manuel Castro Gil, judge of the Superior Court of Bogota, Colombia, is assassinated as he climbs into a taxi, following his indictment of Pablo Escobar for the murder of Lara Bonilla.

July 20, 1995: The total number of US marijuana arrests since 1965 passes the 10,000,000 mark, according to an estimate by NORML.

July 22, 1997: Drug Czar General Barry McCaffrey says, "In the view of the nation's scientific and medical community, marijuana has a high potential for abuse and no generally accepted therapeutic value." He says this despite an editorial from the January 30, 1997 issue of the New England Journal of Medicine that states, "Federal authorities should rescind their prohibition of the medicinal use of marijuana for seriously ill patients and allow physicians to decide which patients to treat."

July 26, 2001: The British newsmagazine The Economist devotes an entire issue to drug policy, endorsing decriminalization and harm reduction.

July 25, 2002: The Hawaiian Tribune Herald reports: Marijuana eradication in Hawaii contributed to the increase in the use of the drug "ice," according to a three-year study prepared for the National Institute on Drug Abuse. The study's four-page executive summary states, "The use of ice in Honolulu had led to particularly serious physical and psychological problems and significant social disruption in poor working communities where it replaced marijuana, which had become scarce and expensive due to eradication policies... Residents were both pushed away from pakalolo [marijuana], their staple drug of choice, and pulled toward ice by a well organized marketing campaign by Asian distributors." It also notes that violence is more prevalent in the Honolulu meth users.

July 26, 2003: The Honolulu Advertiser reports that a Hilo woman who smokes marijuana to treat her glaucoma received a check for $2,000 from her homeowners insurance company for the loss of four plants stolen from her yard. Under a state law passed in 2000, patients with permits who are under a doctor's care may possess up to 3 ounces of marijuana and grow up to seven plants at a time for medical purposes.

July 28, 2003: James Geddes, originally sentenced to 150 years for possession of a small amount of marijuana and paraphernalia and for growing five marijuana plants, is released.

July 21, 2004: The Multidisciplinary Association for Psychedelic Studies (MAPS), Prof. Lyle Craker, and Valerie Corral file lawsuits against the DEA, HHS, NIH, and NIDA for obstructing medical marijuana research.