it's not a hard rule in practice and really depends on the individual and their friends. it may not even be limited to a jan/feb birthday
eg i played a face born in early april 91 who talked to her close bandmate born later in the previous year without honorifics, but also interacts with her other 91 line friends as chingus.
just pay attention to how your muse's real interacts with their bandmates and you should be covered
no subject
eg i played a face born in early april 91 who talked to her close bandmate born later in the previous year without honorifics, but also interacts with her other 91 line friends as chingus.
just pay attention to how your muse's real interacts with their bandmates and you should be covered