15H Max.
          From: 2016/04/01 to 2016/07/31
            +---+---+---+---+---+---+---+
            |Mon|Tue|Wed|Thu|Fri|Sat|Sun|
          +-+---+---+---+---+---+---+---+
          |1| 10|  0| 15|  2| 15|  2|  1|
          +-+---+---+---+---+---+---+---+
          |2|  8|  8|  6| 12| 14|  4|  1|
          +-+---+---+---+---+---+---+---+
          |3| 14|  8| 15| 13|  1|  0|  1|
          +-+---+---+---+---+---+---+---+
          |4| 15|  8| 11|  9| 15|  0|  1|
          +-+---+---+---+---+---+---+---+
          |5| 14|  4|  7|  8| 15|  0|  0|
          +-+---+---+---+---+---+---+---+
          |6|  8|  4| 12|  3| 15|  0|  0|
          +-+---+---+---+---+---+---+---+