test

// Исходные данные
  "1550869200000": {"subscribers": 0, "conversion": 0, "subscribers_day_growth": 0},
      "1550782800000": {"subscribers": 1, "conversion": 1, "subscribers_day_growth": 1},
      "1550696400000": {"subscribers": 2, "conversion": 2, "subscribers_day_growth": 2},
      "1550610000000": {"subscribers": 3, "conversion": 3, "subscribers_day_growth": 3},
      "1550523600000": {"subscribers": 4, "conversion": 4, "subscribers_day_growth": 4},
      "1550437200000": {"subscribers": 5, "conversion": 5, "subscribers_day_growth": 5},
      "1550350800000": {"subscribers": 6, "conversion": 6, "subscribers_day_growth": 6},
      "1550264400000": {"subscribers": 7, "conversion": 7, "subscribers_day_growth": 7},
      "1550178000000": {"subscribers": 8, "conversion": 8, "subscribers_day_growth": 8},
      "1550091600000": {"subscribers": 9, "conversion": 9, "subscribers_day_growth": 9},
      "1550005200000": {"subscribers": 10, "conversion": 10, "subscribers_day_growth": 10},
      "1549918800000": {"subscribers": 11, "conversion": 11, "subscribers_day_growth": 11},
      "1549832400000": {"subscribers": 12, "conversion": 12, "subscribers_day_growth": 12},
      "1549746000000": {"subscribers": 13, "conversion": 13, "subscribers_day_growth": 13},
      "1549659600000": {"subscribers": 14, "conversion": 14, "subscribers_day_growth": 14},
      "1549573200000": {"subscribers": 15, "conversion": 15, "subscribers_day_growth": 15},
      "1549486800000": {"subscribers": 16, "conversion": 16, "subscribers_day_growth": 16},
      "1549400400000": {"subscribers": 17, "conversion": 17, "subscribers_day_growth": 17},
      "1549314000000": {"subscribers": 18, "conversion": 18, "subscribers_day_growth": 18},
      "1549227600000": {"subscribers": 19, "conversion": 19, "subscribers_day_growth": 19},
      "1549141200000": {"subscribers": 20, "conversion": 20, "subscribers_day_growth": 20},
      "1549054800000": {"subscribers": 21, "conversion": 21, "subscribers_day_growth": 21},
      "1548968400000": {"subscribers": 22, "conversion": 22, "subscribers_day_growth": 22},
      "1548882000000": {"subscribers": 23, "conversion": 23, "subscribers_day_growth": 23},
      "1548795600000": {"subscribers": 24, "conversion": 24, "subscribers_day_growth": 24},
      "1548709200000": {"subscribers": 25, "conversion": 25, "subscribers_day_growth": 25},
      "1548622800000": {"subscribers": 26, "conversion": 26, "subscribers_day_growth": 26},
      "1548536400000": {"subscribers": 27, "conversion": 27, "subscribers_day_growth": 27},
      "1548450000000": {"subscribers": 28, "conversion": 28, "subscribers_day_growth": 28},
      "1548363600000": {"subscribers": 29, "conversion": 29, "subscribers_day_growth": 29},
      "1548277200000": {"subscribers": 30, "conversion": 30, "subscribers_day_growth": 30},
      "1548190800000": {"subscribers": 31, "conversion": 31, "subscribers_day_growth": 31},
      "1548104400000": {"subscribers": 32, "conversion": 32, "subscribers_day_growth": 32},
      "1548018000000": {"subscribers": 33, "conversion": 33, "subscribers_day_growth": 33},
      "1547931600000": {"subscribers": 34, "conversion": 34, "subscribers_day_growth": 34},
      "1547845200000": {"subscribers": 35, "conversion": 35, "subscribers_day_growth": 35},
      "1547758800000": {"subscribers": 36, "conversion": 36, "subscribers_day_growth": 36},
      "1547672400000": {"subscribers": 37, "conversion": 37, "subscribers_day_growth": 37},
      "1547586000000": {"subscribers": 38, "conversion": 38, "subscribers_day_growth": 38},
      "1547499600000": {"subscribers": 39, "conversion": 39, "subscribers_day_growth": 39},
      "1547413200000": {"subscribers": 40, "conversion": 40, "subscribers_day_growth": 40},
      "1547326800000": {"subscribers": 41, "conversion": 41, "subscribers_day_growth": 41},
      "1547240400000": {"subscribers": 42, "conversion": 42, "subscribers_day_growth": 42},
      "1547154000000": {"subscribers": 43, "conversion": 43, "subscribers_day_growth": 43},
      "1547067600000": {"subscribers": 44, "conversion": 44, "subscribers_day_growth": 44},
      "1546981200000": {"subscribers": 45, "conversion": 45, "subscribers_day_growth": 45},
      "1546894800000": {"subscribers": 46, "conversion": 46, "subscribers_day_growth": 46},
      "1546808400000": {"subscribers": 47, "conversion": 47, "subscribers_day_growth": 47},
      "1546722000000": {"subscribers": 48, "conversion": 48, "subscribers_day_growth": 48},
      "1546635600000": {"subscribers": 49, "conversion": 49, "subscribers_day_growth": 49},
      "1546549200000": {"subscribers": 50, "conversion": 50, "subscribers_day_growth": 50},
      "1546462800000": {"subscribers": 51, "conversion": 51, "subscribers_day_growth": 51},
      "1546376400000": {"subscribers": 52, "conversion": 52, "subscribers_day_growth": 52},
      "1546290000000": {"subscribers": 53, "conversion": 53, "subscribers_day_growth": 53},
      "1546203600000": {"subscribers": 54, "conversion": 54, "subscribers_day_growth": 54},
      "1546117200000": {"subscribers": 55, "conversion": 55, "subscribers_day_growth": 55},
      "1546030800000": {"subscribers": 56, "conversion": 56, "subscribers_day_growth": 56},
      "1545944400000": {"subscribers": 57, "conversion": 57, "subscribers_day_growth": 57},
      "1545858000000": {"subscribers": 58, "conversion": 58, "subscribers_day_growth": 58},
      "1545771600000": {"subscribers": 59, "conversion": 59, "subscribers_day_growth": 59},
      "1545685200000": {"subscribers": 60, "conversion": 60, "subscribers_day_growth": 60},
      "1545598800000": {"subscribers": 61, "conversion": 61, "subscribers_day_growth": 61},
      "1545512400000": {"subscribers": 62, "conversion": 62, "subscribers_day_growth": 62},
      "1545426000000": {"subscribers": 63, "conversion": 63, "subscribers_day_growth": 63},
      "1545339600000": {"subscribers": 64, "conversion": 64, "subscribers_day_growth": 64},
      "1545253200000": {"subscribers": 65, "conversion": 65, "subscribers_day_growth": 65},
      "1545166800000": {"subscribers": 66, "conversion": 66, "subscribers_day_growth": 66},
      "1545080400000": {"subscribers": 67, "conversion": 67, "subscribers_day_growth": 67},
      "1544994000000": {"subscribers": 68, "conversion": 68, "subscribers_day_growth": 68},
      "1544907600000": {"subscribers": 69, "conversion": 69, "subscribers_day_growth": 69},
      "1544821200000": {"subscribers": 70, "conversion": 70, "subscribers_day_growth": 70},
      "1544734800000": {"subscribers": 71, "conversion": 71, "subscribers_day_growth": 71},
      "1544648400000": {"subscribers": 72, "conversion": 72, "subscribers_day_growth": 72},
      "1544562000000": {"subscribers": 73, "conversion": 73, "subscribers_day_growth": 73},
      "1544475600000": {"subscribers": 74, "conversion": 74, "subscribers_day_growth": 74},
      "1544389200000": {"subscribers": 75, "conversion": 75, "subscribers_day_growth": 75},
      "1544302800000": {"subscribers": 76, "conversion": 76, "subscribers_day_growth": 76},
      "1544216400000": {"subscribers": 77, "conversion": 77, "subscribers_day_growth": 77},
      "1544130000000": {"subscribers": 78, "conversion": 78, "subscribers_day_growth": 78},
      "1544043600000": {"subscribers": 79, "conversion": 79, "subscribers_day_growth": 79},
      "1543957200000": {"subscribers": 80, "conversion": 80, "subscribers_day_growth": 80},
      "1543870800000": {"subscribers": 81, "conversion": 81, "subscribers_day_growth": 81},
      "1543784400000": {"subscribers": 82, "conversion": 82, "subscribers_day_growth": 82},
      "1543698000000": {"subscribers": 83, "conversion": 83, "subscribers_day_growth": 83},
      "1543611600000": {"subscribers": 84, "conversion": 84, "subscribers_day_growth": 84},
      "1543525200000": {"subscribers": 85, "conversion": 85, "subscribers_day_growth": 85},
      "1543438800000": {"subscribers": 86, "conversion": 86, "subscribers_day_growth": 86},
      "1543352400000": {"subscribers": 87, "conversion": 87, "subscribers_day_growth": 87},
      "1543266000000": {"subscribers": 88, "conversion": 88, "subscribers_day_growth": 88},
      "1543179600000": {"subscribers": 89, "conversion": 89, "subscribers_day_growth": 89},
      "1543093200000": {"subscribers": 90, "conversion": 90, "subscribers_day_growth": 90},
      "1543006800000": {"subscribers": 91, "conversion": 91, "subscribers_day_growth": 91}

// Вывод
Sat Feb 16 2019 Неделя
Sat Feb 09 2019 Неделя
Sat Feb 02 2019 Неделя
Sat Jan 26 2019 Неделя
Sat Jan 19 2019 Неделя
Sat Jan 12 2019 Неделя
Sat Jan 05 2019 Неделя
Sat Dec 29 2018 Неделя
Sat Dec 22 2018 Неделя
Sat Dec 15 2018 Неделя
Sat Dec 08 2018 Неделя
Thu Jan 31 2019 Месяц
Wed Jan 30 2019 Месяц