Your mission, should you decide to accept it, is to:
1) Is there a person in your genealogy database that has the same birth date that you do? If so, tell us about him or her - what do you know, and how is s/he related to you?
2) For bonus points, how did you determine this? What feature or process did you use in your software to work this problem out? I think the Calendar feature probably does it, but perhaps you have a trick to make this work outside of the calendar function.
My birthday is April 25. The first person I can think of right offhand that shares my birthday is my 1st cousin once removed, Dee. Her mom and my maternal grandfather are siblings.
After a search of my RootsMagic database, I found two more people.
The first person is my great-great-great-grandfather, Charles Lesperance. He was born 25 Apr 1840, according to an online transcription of baptisms from St. Anne's Catholic Church in Detroit. I still need to verify that this is my Charles. Charles is the great-great-grandfather of my cousin, Dee, mentioned above.
The next person is on my dad's side of the family and is my second cousin three times removed, Helena Trahan. She was born 25 Apr 1910. She was the daughter of Jean Trahan and Bernadine Bernard. Jean was the son of Pierre Marie Trahan and Cidalise Julienne Robinson. Pierre was the son of Delphin Stainville Trahan, my fourth great-grandfather, and a slave named Fanny Becker.
To find these people, I went to Search>Person List>Find>Birth date contains April and Birth date contains 25. Of course, I found instances of people born April 1925 and such, but this was the best way I could figure to do the search.
In my old Family Tree Maker database, I found some more people:
1) Rosalie Hidalgo, b. 25 Apr 1850, my fourth-great-grandaunt (younger sister of my fourth-great-grandmother, Marie Calice Hidalgo)
2) Jean Clete Marcelin Domingue, b. 25 Apr 1828, my fifth-great-granduncle (younger brother of my fifth-great-grandmother, Maria Domingue)
3/4) Thomas Webb, b. 25 Apr 1795, and John Webb, b. 25 Apr 1804, my fourth-great-granduncles (brothers of my fourth-great-grandmother, Sarah Webb)
5) Joseph Thibodeau, b. 25 Apr 1739, my 7th-great-granduncle (older brother of my 7th-great-grandfather, Paul Thibodeau)
6) Anne Savoie, b. 25 Apr 1734, 7th-great-grandaunt (sister of my 7th-great-grandfather, Francois Savoie, and my 7th great-grandmother, Marguerite Savoie)