Calendars for Depo-Provera shots are available from the websites for student health services at Wayne State University and the University of Alaska Anchorage. At Wayne's Campus Health Center site, click on Resources and then Contraception. The next page has a link for a perpetual Depo-Provera calendar.
From the home page of UAA's Student Health and Counseling Center, click on Physical Health and then select Contraception Offered. On the next page, the "Other available contraceptive methods" list has a link to a Depo calendar.
Depo-Provera is a contraceptive injection given every three months, according to Planned Parenthood. It introduces the hormone progestin into a woman's system, which prevents the ovaries from releasing eggs. When used as directed, less than one percent of women using Depo-Provera become pregnant.