Untitled

const data = {
  "John": [
    1999,
    12,
    10
  ],
  "Jane": [
    2001,
    1,
    20
  ],
  "Jack": [
    1989,
    7,
    12
  ],
  "Josh": [
    1960,
    12,
    4
  ],
  "Arjun": [
    "X",
    9,
    30
  ],
  "Bhairav": [
    2000,
    6,
    12
  ],
  "Bhim": [
    1996,
    8,
    14
  ],
  "Binod": [
    1998,
    1,
    13
  ],
  "Chandra": [
    1999,
    9,
    7
  ],
  "Dipak": [
    1996,
    7,
    3
  ],
  "Ganesh": [
    1997,
    6,
    7
  ],
  "Hari": [
    1997,
    7,
    19
  ],
  "Hira": [
    1998,
    6,
    28
  ],
  "Kamal": [
    2001,
    3,
    4
  ],
  "Karna": [
    1999,
    8,
    16
  ],
  "Krishna": [
    1997,
    1,
    28
  ],
  "Lakshman": [
    2000,
    12,
    3
  ],
  "Lal": [
    1999,
    12,
    24
  ],
  "Mana": [
    2000,
    2,
    18
  ],
  "Mohan": [
    1999,
    12,
    20
  ],
  "Narayan": [
    1999,
    9,
    23
  ],
  "Prakash": [
    2001,
    11,
    21
  ],
  "Prem": [
    2000,
    10,
    11
  ]
};

const fdA = Object.entries(data).sort((a,b) => {
  return (new Date(a[1]) - new Date(b[1]));
})
.map((mapd) => {
   return {
     [mapd[0]]: [mapd[1]]
   }
});

console.log(fdA);