All dates between two Date objects (Swift)

Question

I’m creating a date using NSDateComponents().

let startDate = NSDateComponents()
startDate.year = 2015
startDate.month = 9
startDate.day = 1
let calendar = NSCalendar.currentCalendar()
let startDateNSDate = calendar.dateFromComponents(startDate)!

... now I want to print all dates since the startDate until today, NSDate(). I’ve already tried playing with NSCalendarUnit, but it only outputs the whole difference, not the single dates between.

let unit: NSCalendarUnit = [.Year, .Month, .Day, .Hour, .Minute, .Second]
let diff = NSCalendar.currentCalendar().components(unit, fromDate: startDateNSDate, toDate: NSDate(), options: [])

How can I print all dates between two Dateobjects?

Edit 2019

In the meantime the naming of the classes had changed – NSDate is now just Date. NSDateComponents is now called DateComponents. NSCalendar.currentCalendar() is now just Calendar.current.

score 67 · Accepted Answer · edited Jan 18 '20 at 09:37

Just add one day unit to the date until it reaches the current date (Swift 2 code):

var date = startDateNSDate // first date
let endDate = NSDate() // last date

// Formatter for printing the date, adjust it according to your needs:
let fmt = NSDateFormatter()
fmt.dateFormat = "dd/MM/yyyy"

// While date <= endDate ...
while date.compare(endDate) != .OrderedDescending {
    print(fmt.stringFromDate(date))
    // Advance by one day:
    date = calendar.dateByAddingUnit(.Day, value: 1, toDate: date, options: [])!
}

Update for Swift 3:

var date = startDate // first date
let endDate = Date() // last date

// Formatter for printing the date, adjust it according to your needs:
let fmt = DateFormatter()
fmt.dateFormat = "dd/MM/yyyy"

while date <= endDate {
    print(fmt.string(from: date))
    date = Calendar.current.date(byAdding: .day, value: 1, to: date)!
}

@Martin : i am getting this error "Binary operator '<=' cannot be applied to two 'NSDate' operands ". Please help me. — iSmita, Dec 16 '16 at 05:50
@Smita: Did you use the exact Swift 3 code from the second part in the answer? Did you define `date` and `endDate` as `Date` (and not `NSDate`) ? — Martin R, Dec 16 '16 at 07:46

score 48 · Answer 2 · edited Dec 21 '20 at 19:13

Using extension:

extension Date {
    static func dates(from fromDate: Date, to toDate: Date) -> [Date] {
        var dates: [Date] = []
        var date = fromDate
        
        while date <= toDate {
            dates.append(date)
            guard let newDate = Calendar.current.date(byAdding: .day, value: 1, to: date) else { break }
            date = newDate
        }
        return dates
    }
}

Usage:

let datesBetweenArray = Date.dates(from: Date(), to: Date())

score 9 · Answer 3 · edited Jan 19 '18 at 08:40

9

Same thing but prettier:

extension Date {

  func allDates(till endDate: Date) -> [Date] {
    var date = self
    var array: [Date] = []
    while date <= endDate {
      array.append(date)
      date = Calendar.current.date(byAdding: .day, value: 1, to: date)!
    }
    return array
  }
}

How to get all dates for next 20 days:

if let date = Calendar.current.date(byAdding: .day, value: 20, to: Date()) {
  print(Date().allDates(till: date))
}

edited Jan 19 '18 at 08:40

Premal Khetani

3,175
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answered Nov 11 '17 at 14:53

AlexanderZ

2,128
3
20
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what is 'startDate' ? – amin Dec 10 '17 at 21:15
1

@amin change Date() to your startDate – AlexanderZ Dec 11 '17 at 14:56
if let date = Calendar.current.date(byAdding: .day, value: 20, to: Date()) { print(Date().allDates(till: date)) } Calendar.current.date(byAdding: .day, value: 1, to: date)! – Anil Kumar Sep 12 '18 at 08:43

Nikunj Kumbhani · Answer 4 · 2020-11-26T05:04:13.143

Here is Solution of Print all dates between two Dates (Swift 4 Code)

var mydates : [String] = []
var dateFrom =  Date() // First date
var dateTo = Date()   // Last date

// Formatter for printing the date, adjust it according to your needs:
let fmt = DateFormatter()
fmt.dateFormat = "yyy-MM-dd"
dateFrom = fmt.date(from: strstartDate)! // "2018-03-01"
dateTo = fmt.date(from: strendDate)! // "2018-03-05"


while dateFrom <= dateTo {
    mydates.append(fmt.string(from: dateFrom))
    dateFrom = Calendar.current.date(byAdding: .day, value: 1, to: dateFrom)!

}

print(mydates) // Your Result

Output is:

["2018-03-01", "2018-03-02", "2018-03-03", "2018-03-04", "2018-03-05"]

score 3 · Answer 5 · answered Sep 12 '15 at 08:19

Your desired code becomes like

    let startDate = NSDateComponents()
    startDate.year = 2015
    startDate.month = 9
    startDate.day = 1
    let calendar = NSCalendar.currentCalendar()
    let startDateNSDate = calendar.dateFromComponents(startDate)!


    var offsetComponents:NSDateComponents = NSDateComponents();
    offsetComponents.day = 1
    var nd:NSDate = startDateNSDate;

    println(nd)
    while nd.timeIntervalSince1970 < NSDate().timeIntervalSince1970 {
        nd = calendar.dateByAddingComponents(offsetComponents, toDate: nd, options: nil)!;
            println(nd)


    }

score 2 · Answer 6 · answered Jan 25 '17 at 19:31

I am using this approach (Swift 3):

import Foundation

class Dates {
    static func printDatesBetweenInterval(_ startDate: Date, _ endDate: Date) {
        var startDate = startDate
        let calendar = Calendar.current

        let fmt = DateFormatter()
        fmt.dateFormat = "yyyy-MM-dd"

        while startDate <= endDate {
            print(fmt.string(from: startDate))
            startDate = calendar.date(byAdding: .day, value: 1, to: startDate)!
        }
    }

    static func dateFromString(_ dateString: String) -> Date {
        let dateFormatter = DateFormatter()
        dateFormatter.dateFormat = "yyyy-MM-dd"

        return dateFormatter.date(from: dateString)!
    }
}

and I am calling this like:

Dates.printDatesBetweenInterval(Dates.dateFromString("2017-01-02"), Dates.dateFromString("2017-01-9"))

The output is:

dwaz · Answer 7 · 2021-10-05T19:01:05.613

You can use the compactMap operator. I like to put these functions in an extension so they are reusable. It's hard to make a range of dates, so I made a range of ints and loop through that.

extension Calendar {
    func getDates(_ startDate: Date, _ endDate: Date) -> [Date]  {
        // make sure parameters are valid
        guard startDate < endDate else { print("invalid parameters"); return [] }
        // how many days between dates?
        let dayDiff = Int(self.dateComponents([.day], from: startDate, to: endDate).day ?? 0)
        let rangeOfDaysFromStart: Range<Int> = 0..<dayDiff + 1
        let dates = rangeOfDaysFromStart.compactMap{ self.date(byAdding: .day, value: $0, to: startDate) }
        return dates
    }
}

Your usage could be:

let startDate = Date(dateString: "1/2/2017", format: "M/d/yyyy")
let endDate = Date(dateString: "1/9/2017", format: "M/d/yyyy")
let dates = Calendar.current.getDates(startDate, endDate)
let f = DateFormatter(withFormat: "yyyy-MM-dd", locale: "us_en")
print(dates.compactMap{f.string(from: $0)}.joined(separator: ", "))

output:

"2017-01-02, 2017-01-03, 2017-01-04, 2017-01-05, 2017-01-06, 2017-01-07, 2017-01-08, 2017-01-09"

All dates between two Date objects (Swift)

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