Ahusband and wife celebrate their birthdays on the same day of the month, but in different months. every year, their birthdays fall on the same day of the week. if the husband's birthday is in march and the wife's birthday is later in the year, find the month of the wife's birthday

Husband is in march
wife is after march
we have
b-days are same day
ex march 3 and june 3
also, they fall on the same day of the week
so continuing ex. march 3 wed and june 3 wed

so we just look at the calllendar for days that fall on the same day of the week and have the same nuber and are after march
basically, the easy way to find it is to look at the months and see which months that are after march start on the same day
ex. this year march 1 is on a tuesday
so find other months that start on tuesday
answer is September and December

so the Wife's birthday could be in September or December