Reference: getDateCorrespondingToWeekOfYear
getDateCorrespondingToWeekOfYear(Y, n) returns the date and time structure corresponding to the zeroth millisecond of the nth week of the year Y. Example: getDateCorrespondingToWeekOfYear(1987, 50) year: 1987 month: 12 day: 7 weekOfYear: 50 dayOfYear: 341 dayOfWeek: 1 hour: 0 minute: 0 second: 0 millisecond: 0