February 23, 1887: The 49th Congress of the United States enacts legislation that provides a misdemeanor fine of between $50 and $500 ($1,100-$11,000 in today's dollars) for any US or Chinese citizen found guilty of violating the ban on opium.

February 21, 1971: The United States joins with other countries in signing the international Convention on Psychotropic Substances, in Vienna, Austria.

February 20, 1997: CNN reports that a prestigious panel of experts convened by the National Institutes of Health said there is promising evidence that smoking marijuana may ease the suffering of some seriously ill patients.

February 25, 1997: President Bill Clinton proposes spending $175 million for a national television blitz targeting drug use by America's youth. Matching funds from the private sector would be sought. Clinton says, "If a child does watch television -- and what child doesn't -- he or she should not be able to escape these messages."

February 22, 2000: Due to drug-related violence, the US State Department issues a traveler's advisory warning for Tijuana, Mexico City, and Ciudad Juárez, which are labeled as "dangerous." Juárez Mayor Gustavo Elizondo protests to US Secretary of State Madeleine Albright.

February 24, 2000: Members of the Belgian Parliament make a proposal to modify their laws in order to partially decriminalize the possession of cannabis and its derivatives. Simple marijuana possession is effectively decriminalized three years later.

February 21, 2001: The New York Times reports that a recent study released at a World Health Organization meeting found that American teens are more likely to smoke marijuana and use other illicit drugs than their European counterparts. While they are more likely to smoke cigarettes and drink alcohol, only 17 percent of European 10th graders reported marijuana use, compared to 41 percent of American 10th graders. The study is interesting considering the US implements a zero-tolerance approach while many European countries tend to employ harm-reduction strategies and are generally more tolerant.

February 19, 2004: Veterans and medical marijuana activists in San Francisco hold a protest/rally in front of San Francisco's Veterans Administration Outpatient Clinic and ask doctors working for the Veteran's Administration to help provide better access to medical marijuana.