Better way to manage the date.

Date.swift

func dateOutOf(Iso8601 date: String) -> Date {
    let dateFormatter = DateFormatter()
    // dateFormatter.calendar = Calendar(identifier: .iso8601)
    // dateFormatter.locale = Locale(identifier: "en_US_POSIX")
    dateFormatter.dateFormat = "yyyy-MM-dd'T'HH:mm:ss.SSSz" //Your date format
    dateFormatter.timeZone = TimeZone(secondsFromGMT: 0) //Current time zone
    let date = dateFormatter.date(from: date) //according to date format your date string
    return date! //Convert String to Date
}

let date = "2017-07-11T10:52:36.577Z"

// March 21, 2017 17:19 IST
func returnDateForTheNews(date: String) -> String {
    let months = ["", "January", "February", "March", "April", "May", "June", "July", "August", "September", "Octomber", "November", "December"]
    let tempDate = dateOutOf(Iso8601: date)

    var componentsToAdd = DateComponents()
    componentsToAdd.hour = 5
    componentsToAdd.minute = 30
    let calender = Calendar.current
    let date5 = calender.date(byAdding: componentsToAdd, to: tempDate)
    
    let components = calender.dateComponents([.month, .day, .hour, .minute, .year], from: tempDate)
    
    return "\(months[components.month!]) \(components.day!), \(components.year!) \(components.hour!):\(components.minute!) IST"
}

let toPrint = returnDateForTheNews(date: date)
print(toPrint)