Reference: getDateCorrespondingToDayOfYear
getDateCorrespondingToDayOfYear(Y, n) returns the date and time structure corresponding to the zeroth millisecond of the nth day of the year Y. Example: getDateCorrespondingToDayOfYear(2010, 100) year: 2010 month: 4 day: 10 weekOfYear: 14 dayOfYear: 100 dayOfWeek: 6 hour: 0 minute: 0 second: 0 millisecond: 0