Date and time format in VB.Net

A standard date and time format string uses a single format specifies to define the text representation of a date and time value. Any date and time format string that contains more than one character, including white space, is interpreted as a custom date and time format string. More about standard date and time format string visit MSDN Library.

Here are the following codes:

Example 1

Dim time As DateTime = DateTime.Now
Dim format As String = "MMM " & "," & "ddd d HH:mm yyyy"
MessageBox.Show(time.ToString(format))

Output: May, Tue 18 16:46 2010

Example 1

Dim now As DateTime = DateTime.Now

        MessageBox.Show(now.ToString("d"))
        MessageBox.Show(now.ToString("D"))
        MessageBox.Show(now.ToString("f"))
        MessageBox.Show(now.ToString("F"))
        MessageBox.Show(now.ToString("g"))
        MessageBox.Show(now.ToString("G"))
        MessageBox.Show(now.ToString("m"))
        MessageBox.Show(now.ToString("M"))
        MessageBox.Show(now.ToString("o"))
        MessageBox.Show(now.ToString("O"))
        MessageBox.Show(now.ToString("s"))
        MessageBox.Show(now.ToString("t"))
        MessageBox.Show(now.ToString("T"))
        MessageBox.Show(now.ToString("u"))
        MessageBox.Show(now.ToString("U"))
        MessageBox.Show(now.ToString("y"))
        MessageBox.Show(now.ToString("Y"))

Output:

5/18/2010

Tuesday, May 18, 2010

Tuesday, May 18, 2010 4:47 PM

Tuesday, May 18, 2010 4:47:55 PM

5/18/2010 4:47 PM

5/18/2010 4:47:55 PM

May 18

2010-05-18T16:47:55.9620000-06:00

2010-05-18T16:47:55

4:47 PM

4:47:55 PM

2010-05-18 16:47:55Z

Tuesday, May 18, 2010 10:47:55 PM

May, 2010

Example 3

Dim now As DateTime = DateTime.Now

        MessageBox.Show(now.ToLongDateString())
        MessageBox.Show(now.ToLongTimeString())
        MessageBox.Show(now.ToShortDateString())
        MessageBox.Show(now.ToShortTimeString())
        MessageBox.Show(now.ToString())

Output:

Tuesday, May 18, 2010

4:49:57 PM

5/18/2010

4:49 PM

5/18/2010 4:49:57 PM

Example 3

Dim now As DateTime = DateTime.Now

        ' Print out all the days.
        For index As Integer = 0 To 6
            MessageBox.Show(now.ToString("ddd"))
            now = now.AddDays(1)
        Next

Output:

Tue

Wed

Thu

Fri

Sat

Sun

Mon

Example 4

Dim now As DateTime = DateTime.Now
        For index As Integer = 0 To 6
            MessageBox.Show(now.ToString("dddd"))
            now = now.AddDays(1)
      Next

Output:

Tuesday

Wednesday

Thursday

Friday

Saturday

Sunday

Monday

Example 5

Dim now As DateTime = DateTime.Now
        For index As Integer = 0 To 1
            MessageBox.Show(now.ToString("tt "))
            now = now.AddHours(12)
        Next

Output:

Example 6

   Dim now As DateTime = DateTime.Now
        MessageBox.Show(now.ToString("yy"))
        MessageBox.Show(now.ToString("yyyy"))

Output:

2010

The following are examples of user-defined date and time formats for December 7, 1958, 8:50 PM, 35 seconds.

Format	Displays
M/d/yy	12/7/58
d-MMM	7-Dec
d-MMMM-yy	7-December-58
d MMMM	7 December
MMMM yy	December 58
hh:mm tt	08:50 PM
h:mm:ss t	8:50:35 P
H:mm	20:50
H:mm:ss	20:50:35
M/d/yyyy H:mm	12/7/1958 20:50