Neither one makes sense, but "How many days are you?" is grammatically correct.
if you meant how many week days then x = x * 5 if you meant how many days alltogether then x = x * 7
My Many Colored Days has 40 pages.
180 days equals 180 days,
May 1827 had 31 days.
how many minutes in 16425 days
There are 16,587 days in this many minutes.
how many sunny days in Hartford
25 days out of the 365 days of the year, have 30 days.
It's about 224.7 Earth days.
Seven days in Israel, eight elsewhere.