Place counter under some weird business logic

counter.js

const steps = [31, 29, 31, 30, 31, 30];
const year = [];
let modifiedYear = []

// First date
const counterDate = 14;
// step is equal to month length

steps.forEach(count => {
  year.push(Array(count).fill(0))
})

var newYearArr = year.flat();

// Выставить дату первый раз
newYearArr[counterDate - 1] = 1;

steps.reduce((acc, step) => {
    var result = acc + step;
  
    newYearArr[result] = 1;
  
    return result;
  
}, counterDate);


var chunkedArray = [];

steps.forEach((step, index) => {
  chunkedArray.push(newYearArr.splice(0, step))
})

console.log(chunkedArray);