Charlotte Vickers is, apparently, a figment of someones imagination as there is no saint or candidate for sainthood by that name.
Charlotte is not a saint nor a blessed so has no feast day.
I can find no saint named Teresa Vickers.
Charlie Vickers was a Man who in the Late 1980's became quite famous for his commercial jingles. i have a cousin named charlie vickers great at football and other stuff!!
Douglas Vickers died in 1937.
Philip Vickers Fithian died in 1776.
Geoffrey Vickers died on 1982-03-16.
William Edward Vickers died in 1965.
Albert Vickers Bryan died in 1984.
Rube Vickers died on 1958-12-09.
F. B. Vickers died in 1985.
Jack Vickers died on 1980-09-24.
Arthur Vickers died on 1944-07-27.