This weeks method is a date helper for getting days or dates in one weeks, so this method only have 3 arguments such as year, week number, and date format.
Or you may want to week number first before doing render those week dates, you need to use day method (without s) and this method only have 3 arguments as well like year, month, and day/date number.
$.date.week(2021, 6, 21) //=> 25
If you want to get all week numbers in one month or one year, you can use one of the methods below.
// To get all week numbers in one month
$.date.weeksInMonth(2022, 1)
//=> ['1', '2', '3', '4', '5']
// There only 52 weeks in one year (so you don't need this)
$.date.weeksInYear(2021) //=> 52
// Or you may want to get a specific week with its first and last date
$.date.weeksOfYear(2021, 26, 'DD')
//=> {
// '1': [ '03', '09' ], '2': [ '10', '16' ], '3': [ '17', '23' ],
// '4': [ '24', '30' ], '5': [ '31', '06' ], '6': [ '07', '13' ],
// '7': [ '14', '20' ], '8': [ '21', '27' ], '9': [ '28', '06' ],
// '10': [ '07', '13' ], '11': [ '14', '20' ], '12': [ '21', '27' ],
// '13': [ '28', '03' ], '14': [ '04', '10' ], '15': [ '11', '17' ],
// '16': [ '18', '24' ], '17': [ '25', '01' ], '18': [ '02', '08' ],
// '19': [ '09', '15' ], '20': [ '16', '22' ], '21': [ '23', '29' ],
// '22': [ '30', '05' ], '23': [ '06', '12' ], '24': [ '13', '19' ],
// '25': [ '20', '26' ], '26': [ '27', '03' ]
}