Wikipedia calls it a holiday to commemorate the day "in 1953 when James Watson, Francis Crick, Maurice Wilkins, Rosalind Franklin and colleagues published papers in the journal Nature on the structure of DNA." Fifty years later, The U.S. Senate and House of Representatives proclaimed a one-time celebration of DNA Day on April 25, 2003. But that has not stopped groups from celebrating the day every year since.
The National Human Genome Research Institute even has a web page devoted to events going on in regards to DNA Day.
Though we do not get a day off work for DNA Day, what we usually get (at least for the last several years) are various sales on DNA testing kits. DNA Day is this Friday, April 25.
So if you are interested in doing a DNA test on yourself or a family member, keep an eye out for announcements of DNA Day Sales. Maybe as early as Wednesday or Thursday but perhaps not until the day itself. In the meantime, if you have not already, prepare yourself by learning about the various tests available, how they may help you in your research, and about the various companies that offer the tests.
All three of the major genealogy-related DNA testing companies offer Frequently Asked Questions (FAQs) and learning/information pages on the different tests and what each can do for you. These companies are:
As I learn of the sales, I'll add posts about them here.