# DateTime.Day プロパティ

## 定義

このインスタンスで表される月の日付を取得します。

``````public:
property int Day { int get(); };``````
``public int Day { get; }``
``member this.Day : int``
``Public ReadOnly Property Day As Integer``

#### プロパティ値

DateTime の日付部分 (1 ～ 31)。

## 例

Dayプロパティの例を次に示します。

``````System::DateTime moment = System::DateTime(
1999, 1, 13, 3, 57, 32, 11 );

// Year gets 1999.
int year = moment.Year;

// Month gets 1 (January).
int month = moment.Month;

// Day gets 13.
int day = moment.Day;

// Hour gets 3.
int hour = moment.Hour;

// Minute gets 57.
int minute = moment.Minute;

// Second gets 32.
int second = moment.Second;

// Millisecond gets 11.
int millisecond = moment.Millisecond;
``````
``````System.DateTime moment = new System.DateTime(
1999, 1, 13, 3, 57, 32, 11);
// Year gets 1999.
int year = moment.Year;

// Month gets 1 (January).
int month = moment.Month;

// Day gets 13.
int day = moment.Day;

// Hour gets 3.
int hour = moment.Hour;

// Minute gets 57.
int minute = moment.Minute;

// Second gets 32.
int second = moment.Second;

// Millisecond gets 11.
int millisecond = moment.Millisecond;
``````
``````open System

let moment = System.DateTime(1999, 1, 13, 3, 57, 32, 11)

// Year gets 1999.
let year = moment.Year

// Month gets 1 (January).
let month = moment.Month

// Day gets 13.
let day = moment.Day

// Hour gets 3.
let hour = moment.Hour

// Minute gets 57.
let minute = moment.Minute

// Second gets 32.
let second = moment.Second

// Millisecond gets 11.
let millisecond = moment.Millisecond
``````
``````Dim moment As New System.DateTime(1999, 1, 13, 3, 57, 32, 11)

' Year gets 1999.
Dim year As Integer = moment.Year

' Month gets 1 (January).
Dim month As Integer = moment.Month

' Day gets 13.
Dim day As Integer = moment.Day

' Hour gets 3.
Dim hour As Integer = moment.Hour

' Minute gets 57.
Dim minute As Integer = moment.Minute

' Second gets 32.
Dim second As Integer = moment.Second

' Millisecond gets 11.
Dim millisecond As Integer = moment.Millisecond
``````

## 注釈

プロパティは Day 、現在の値が他のカレンダーを使用してインスタンス化された場合や、現在 DateTime のカルチャの既定のカレンダーがグレゴリオ暦ではない場合でも、グレゴリオ暦の月の日を常に返します。 他のカレンダーを使用して特定の日付の月の日を取得するには、そのカレンダーの Calendar.GetDayOfMonth メソッドを呼び出します。 次の例では、 Day プロパティと メソッドの両方を HijriCalendar.GetDayOfMonth 使用して、Hijri カレンダーを使用してインスタンス化された値の月 DateTime の日を取得します。

``````// Return day of 1/13/2009.
DateTime dateGregorian = new DateTime(2009, 1, 13);
Console.WriteLine(dateGregorian.Day);
// Displays 13 (Gregorian day).

// Create date of 1/13/2009 using Hijri calendar.
HijriCalendar hijri = new HijriCalendar();
DateTime dateHijri = new DateTime(1430, 1, 17, hijri);
// Return day of date created using Hijri calendar.
Console.WriteLine(dateHijri.Day);
// Displays 13 (Gregorian day).

// Display day of date in Hijri calendar.
Console.WriteLine(hijri.GetDayOfMonth(dateHijri));
// Displays 17 (Hijri day).
``````
``````// Return day of 1/13/2009.
let dateGregorian = DateTime(2009, 1, 13)
printfn \$"{dateGregorian.Day}"
// Displays 13 (Gregorian day).

// Create date of 1/13/2009 using Hijri calendar.
let hijri = HijriCalendar()
let dateHijri = DateTime(1430, 1, 17, hijri)
// Return day of date created using Hijri calendar.
printfn \$"{dateHijri.Day}"
// Displays 13 (Gregorian day).

// Display day of date in Hijri calendar.
printfn \$"{hijri.GetDayOfMonth dateHijri}"
// Displays 17 (Hijri day).
``````
``````' Return day of 1/13/2009.
Dim dateGregorian As Date = #1/13/2009#
Console.WriteLine(dateGregorian.Day)
' Displays 13 (Gregorian date).

' Create date of 1/13/2009 using Hijri calendar.
Dim hijri As New HijriCalendar()
Dim dateHijri As Date = New Date(1430, 1, 17, hijri)
' Return day of date created using Hijri calendar.
Console.WriteLine(dateHijri.Day)
' Displays 13 (Gregorian date).

' Display day of date in Hijri calendar.
Console.WriteLine(hijri.GetDayOfMonth(dateHijri))
' Displays 17 (Hijri date).
``````

``````CultureInfo originalCulture = Thread.CurrentThread.CurrentCulture;

// Change current culture to ar-SA.
CultureInfo ci = new CultureInfo("ar-SA");

DateTime hijriDate = new DateTime(1430, 1, 17,
// Display date (uses calendar of current culture by default).
Console.WriteLine(hijriDate.ToString("dd-MM-yyyy"));
// Displays 17-01-1430.

// Display day of 17th of Muharram
Console.WriteLine(hijriDate.Day);
// Displays 13 (corresponding day of January in Gregorian calendar).

// Display day of 17th of Muharram in Hijri calendar.
// Displays 17.

``````
``````open System
open System.Globalization

// Change current culture to ar-SA.
let ci = CultureInfo "ar-SA"

let hijriDate = new DateTime(1430, 1, 17,
// Display date (uses calendar of current culture by default).
printfn \$"""{hijriDate.ToString "dd-MM-yyyy"}"""
// Displays 17-01-1430.

// Display day of 17th of Muharram
printfn \$"{hijriDate.Day}"
// Displays 13 (corresponding day of January in Gregorian calendar).

// Display day of 17th of Muharram in Hijri calendar.
// Displays 17.

``````
``````Dim originalCulture As CultureInfo = Thread.CurrentThread.CurrentCulture

' Change current culture to ar-SA.
Dim ci As New CultureInfo("ar-SA")

Dim hijriDate As New Date(1430, 1, 17, _
' Display date (uses calendar of current culture by default).
Console.WriteLine(hijriDate.ToString("dd-MM-yyyy"))
' Displays 17-01-1430.

' Display day of 17th of Muharram
Console.WriteLine(hijriDate.Day)
' Displays 13 (corresponding day of January in Gregorian calendar).

' Display day of 17th of Muharram in Hijri calendar.