birthday Cal is a weekday calendar!

You've a list of people. Say -

 A = 2/15/1978
 B = 5/23/1983

User inputs the year as "2015".

So,
A's birthday in 2015 will fall into Sunday (because 2/15/2015 is Sunday). B's birthday will fall into Saturday (because 5/23/2015 is Saturday)

You've to put A in Sunday's box. And B in Saturday's box on the calendar.

Process the given json input and place people's initials in the card according to these rules -

If there a box is empty, it should add the day--empty class to the box.
Each person must always be rendered as square
Order people inside the card based on their age (youngest to oldest)
Each square in a card must be of equal size and fit them in such a way that every person occupies maximum area.

Examples ‐

Submitting your work ‐

Your submission should be functional within this page - see work area.
Write your code in pure JS.
Use day--empty class on .cal__day to render empty calendar dates. Use .day__person to render birthdays. See source.

Work Area

[
    {
      "name": "Tyrion Lannister",
      "birthday": "12/02/1978"
    }, {
      "name": "Cersei Lannister",
      "birthday": "11/30/1975"
    }, {
      "name": "Daenerys Targaryen",
      "birthday": "11/24/1991"
    }, {
      "name": "Arya Stark",
      "birthday": "11/25/1996"
    }, {
      "name": "Jon Snow",
      "birthday": "12/03/1989"
    }, {
      "name": "Sansa Stark",
      "birthday": "05/08/1992"
    }, {
      "name": "Jorah Mormont",
      "birthday": "12/16/1968"
    }, {
      "name": "Jaime Lannister",
      "birthday": "12/06/1975"
    }, {
      "name": "Sandor Clegane",
      "birthday": "11/07/1969"
    }, {
      "name": "Tywin Lannister",
      "birthday": "10/12/1951"
    }, {
      "name": "Theon Greyjoy",
      "birthday": "12/31/1989"
    }, {
      "name": "Samwell Tarly",
      "birthday": "12/07/1990"
    }, {
      "name": "Joffrey Baratheon",
      "birthday": "06/12/1992"
    }, {
      "name": "Catelyn Stark",
      "birthday": "12/03/1962"
    }, {
      "name": "Bran Stark",
      "birthday": "12/02/1995"
    }, {
      "name": "Petyr Baelish",
      "birthday": "11/20/1974"
    }, {
      "name": "Robb Stark",
      "birthday": "11/28/1986"
    }, {
      "name": "Brienne of Tarth",
      "birthday": "11/27/1985"
    }, {
      "name": "Margaery Tyrell",
      "birthday": "12/02/1989"
    }, {
      "name": "Stannis Baratheon",
      "birthday": "09/14/1971"
    }, {
      "name": "Davos Seaworth",
      "birthday": "02/13/1973"
    }, {
      "name": "Tormund Giantsbane",
      "birthday": "12/14/1974"
    }, {
      "name": "Jeor Mormont",
      "birthday": "11/01/1955"
    }, {
      "name": "Eddard Stark",
      "birthday": "12/02/1963"
    }, {
      "name": "Khal Drogo",
      "birthday": "12/05/1980"
    }, {
      "name": "Ramsay Bolton",
      "birthday": "12/05/1976"
    }, {
      "name": "Robert Baratheon",
      "birthday": "12/02/1965"
    }, {
      "name": "Daario Naharis",
      "birthday": "12/02/1985"
    }, {
      "name": "Viserys Targaryen",
      "birthday": "12/06/1984"
    }
]

Year Update