The first observance of World AIDS Day was Dec. 1, 1988. Now, it is an international event with different gatherings around the world in multiple cities.
In Tucson, a celebration will be held at Hotel Congress from 4 p.m. to 8 p.m. Saturday, followed by a tribute and dance party at 9 p.m.
While much progress has been made in the battle against AIDS, including testing, education and medications that can improve and prolong the lives of those who are living with HIV, there is still no cure.
Jerry Diaz, senior health education specialist at SAAF, the Southern Arizona AIDS Foundation, says he hopes people remember something on the 25th anniversary and beyond.
"AIDS is still here and we want to make sure that we keep reminding that AIDS is still here so that funding comes from the right sources and that people are just aware of it," Diaz says.
"And all that we've learned about AIDS and HIV continues to go on and we hope that in the future one day we'll be celebrating World AIDS Day as the day that we can say, 'we got rid of the disease' and it'll be more of a commemoration than an actual remembrance of those people who lived with the disease," he adds.
Experts say tens of millions of people around the world have died from AIDS or are infected with HIV.