How to get the current day number in current month and year

Question

I am using this code to get the number of day in the current week:

static func currentDayOfWeek() -> Int {
    let comp = NSCalendar.current.dateComponents([.weekday], from: Date())
    if comp.weekday == 1 {
        return 7
    }

    return comp.weekday! - 1
}

Monday =  1
Tuesday = 2
...........
Sunday =  7

I can't manage to figure out how to get the current day number of the month and year.

For example for today current day number for the month should be 3 and for the year it should be 277.

Any suggestions ?

Day of year: http://stackoverflow.com/questions/28712883/nsdate-day-of-the-year-swift — rmaddy, Oct 03 '16 at 18:26
Unrelated to your question but it seems your code is shifting the day of the week. Sunday -> Saturday. Monday -> Sunday, ..., Saturday -> Friday. Why are you doing this? — rmaddy, Oct 03 '16 at 18:39
For everyone, Sunday returns 1. I get that from the code. My question is why do you want Monday to be 1 instead of the standard 2? All of the APIs treat Sunday as 1, Monday as 2 etc. — rmaddy, Oct 03 '16 at 18:52
Because I need to know how many days passed from the current week to calculate some averages — Adrian, Oct 04 '16 at 12:24

score 7 · Accepted Answer · edited Oct 03 '16 at 18:26

7

let dayYear = Calendar.current.ordinality(of: .day, in: .year, for: Date())

let dayMonth = Calendar.current.ordinality(of: .day, in: .month, for: Date())

edited Oct 03 '16 at 18:26

rmaddy

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answered Oct 03 '16 at 18:24

LDNZh

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14

score 1 · Answer 2 · answered Oct 03 '16 at 18:33

func currentDayOfMonth()->Int {
    return NSCalendar.currentCalendar().ordinalityOfUnit(NSCalendarUnit.Day, inUnit: NSCalendarUnit.Month, forDate: NSDate())
}

func currentDayOfYear()->Int {
    return NSCalendar.currentCalendar().ordinalityOfUnit(NSCalendarUnit.Day, inUnit: NSCalendarUnit.Year, forDate: NSDate())
}

score -1 · Answer 3 · edited May 23 '17 at 12:15

The original answer is from this post.

This will return "Monday" or the day of the week:

func getDayOfWeek(_ today:String) -> String? {

    let weekdays = [1:"Sunday", 2:"Monday", 3:"Tuesday", 4:"Wednesday", 5:"Thursday", 6:"Friday", 7:"Saturday"]

    let formatter  = DateFormatter()
    formatter.dateFormat = "MM-dd-yyyy"
    if let todayDate = formatter.date(from: today) {
        let myCalendar = Calendar(identifier: .gregorian)
        let weekDay = myCalendar.component(.weekday, from: todayDate)
        let day = weekdays[weekDay]

        return day
    } else {
        return nil
    }
}

getDayOfWeek("10-03-2016")

This will return "1" or the day's number for the week:

func getDayOfWeek(_ today:String) -> Int? {

    let formatter  = DateFormatter()
    formatter.dateFormat = "MM-dd-yyyy"
    if let todayDate = formatter.date(from: today) {
        let myCalendar = Calendar(identifier: .gregorian)
        let weekDay = myCalendar.component(.weekday, from: todayDate)

        return weekDay
    } else {
        return nil
    }
}

getDayOfWeek("10-03-2016")

1) The question didn't ask how to get the weekday. 2) The question didn't ask about parsing strings. 3) The first method has a hardcode array of weekday names in English. People using other languages won't like that. `DateFormatter` already has a property with weekday names in the appropriate language for a given locale. — rmaddy, Oct 04 '16 at 14:49

How to get the current day number in current month and year

3 Answers3