Sunday Has Six


Sunday has 6,
Monday and Tuesday have 2.
Wednesday has 1,
Thursday has 2, Friday only 1.
Saturday has none.

What is it? 
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Answer:
New letters

Sunday      the first of the list, therefore all 6 letters (S, U, N, D, A & Y) are new
Monday      2 new letters (M & O)
Tuesday     2 new letters  (T & E)
Wednesday   only 1 new letter (W)
Thursday    2 new letters  (H & R)
Friday      1 new letter  (I)
Saturday    no new letters