14H Max.
          From: 2015/04/01 to 2015/07/31
            +---+---+---+---+---+---+---+
            |Mon|Tue|Wed|Thu|Fri|Sat|Sun|
          +-+---+---+---+---+---+---+---+
          |1|  2|  0| 15|  1|  0|  1|  0|
          +-+---+---+---+---+---+---+---+
          |2| 15|  6| 12|  9| 14| 10|  0|
          +-+---+---+---+---+---+---+---+
          |3| 15|  9| 15| 15| 11|  0|  0|
          +-+---+---+---+---+---+---+---+
          |4|  1| 10|  9|  6| 15|  0|  0|
          +-+---+---+---+---+---+---+---+
          |5| 15|  5|  5|  7| 15|  0|  0|
          +-+---+---+---+---+---+---+---+
          |6|  8|  3|  4|  6| 15|  0|  0|
          +-+---+---+---+---+---+---+---+