I, myself, highly recommend this video for any WillCare advocate for, as far as I am concerned, Gibi is the only FNaFtuber with media literacy. He presents good narrative reasons for why WillCare is (obviously) canon.
Michael William Schmidt - 14th of February or 21st of April, 1969.
*Michael being 14 during the events of FNaF 4 feels right to me personally, as I was a massive arsehole at that age too.
*February 14th came as a result of me taking the year the first game released in (2014), removing the zero (214), and converting it into a date (21/4 or 2/14 depending on what date format you use).
William Thomas Afton - 2nd of March, 1946.
*For some inexplicable reason, I love the idea of William Afton being 39 years of age when he did the MCI in 1985.
*I hundred percent see Afton as the type of person to have a kid immediately after graduating college (it's good for his self-image!).
*This birthday would make the exact release date of the third game to be Afton's 69th birthday and that's fucking hillarious.
Elizabeth Eleanor Afton - 1st of May, 1974 or 1977.
*I alternate between either Elizabeth being the middle child or the youngest depending on what story I'm creating. I do favour towards Elizabeth being the youngest of the family because Dave has middle child energy lmao.
*I don't know precisely how to explain it, but a May birthday suits Elizabeth really well in my opinion.
David Evan Afton - 23rd of July, 1975.
*With FNaF 4 releasing on a summer day & the FNaF 4 minigames being able to be interpreted as taking place somewhere in the summer, it felt only appropriate to me giving Dave this date.
Trisha Lora Schmidt - 7th of October, 1946.
*I got lazy and reused Sister Location's release date for her birthday.
*She's born on the same year as William, as I picture them first meeting in college.