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ASP ( Active Server Pages )

                 Index              

 

Finding Today date and time and changing the format on location

In ASP using VBScript let us learn how to get present date, time in different formats. As we run ASP as a server side scripting process using VBScript as language, the time or date we will get is the time or date of the server. NOT THE LOCAL TIME OF THE CUMPUTER we are using to access the page. Local time can be found out by using client side JavaScript function for date and time. In ASP we will start with printing present ( today ) date. Here is the format.

Here d_today is the variable and it will store the value of Date. Here is the code to display the present date.
 

To display the time along with the date we have to use Now.
 

Dim d_today
d_today=Now
Response.Write d_today

The code above will print todays date along with time Hour: Minute : Second.
To display only time we can use Time function.
 

We can change the date format displayed based on our requirement by using SetLocal function. Let us try to display date in UK English format. Here is the code.

 

 

Display of date and time in local format in ASP using FormatDateTime

We can display Formatted date and time by using FormatDateTime function of VBScript within ASP. This function can take only date , only time or both date and time and display in specified format. Here is the format the function FormatDateTime uses.
 

FormatDateTime(my_date,Format)

Here my_date is the date variable and Format takes the value of 0 to 4 and format the display based on this. The table at the end of this page displays all possible formats with different value of Format.
 

Here is the code to use FromatDateTime function.
 

Here the Format value is specified as 0 so the output of this is here .
 

       For different values of Format ( 0 to 4 ) Here is a table of displays. Note that SetLocale is set to USA format. For other list of LCID value of local formats please see the article on today date and time.                      

Format	Display	Type	Details
0	vbGeneralDate	7/19/2006 8:38:39 PM	Date and Time
1	vbLongDate	Wednesday, July 19, 2006	Date in Long format
2	vbShortDate	7/19/2006	Date in m/d/yyyy
3	vbLongTime	9:53:22 PM	Long Time
4	vbShortTime	15:53	Short Date

DateAdd function to add date and time

We can add date by using DateAdd function of VBScript using in ASP. We can add any type of value like day, month , year etc using DateAdd function. Here is the syntax for the DateAdd function.

Here date_type is the type of date to be added. It can be month, year, Day, Hour, minute etc. Different values are available in a table at the end of this tutorial. The argument increment_by is the interval we want to add to the third argument date.

Here is the code explaining the use of DateAdd function.

Dim d_today,d_added
d_today=Date
Response.Write "Today date is " & d_today & "<br>"
d_added=DateAdd("yyyy",5,d_today)
Response.Write "Add 5 Years " & d_added & "<br>"

In the above code we have added five years to the current date. By changing the value of date_type we can add month, days etc to the present date. Here is the code to add 6 months to today.
 

d_added=DateAdd("m",6,d_today)

DateAdd function will not return any invalid date. Let us try with this example.

This line will return 2/29/2004,

Now let us change the year to 2003 and see the result

d_added=DateAdd("d",32,#1/28/03#)

The output of above line is 3/1/2003
This way we can add different types of dates to an existing date & time.
Table for different date_type values
 

Value	Meaning
"yyyy"	Year
"m"	Month
"d"	Day
"h"	Hour
"n"	Minute
"s"	Second
"w"	Weekday
"ww"	Week of the year
"q"	Quarter

Finding out difference in two dates by using DateDiff function

We can find out the difference between two dates by using DateDiff function of VBScript used in ASP. DateDiff() finds out the difference of the dates based on the required date part like month, year, days etc. Here is the basic syntax of DateDiff function.
 

Here date_type is the date part to be considered while returning the output. This can be month, day, year etc. The table with different values of date_type is listed at the end. Next two arguments date1 and date2 are two date values for which difference is to be calculated. The other two arguments first_dow and first_woy are optional arguments. First_dow takes the value to specify what is to be taken as first day of the week and the other value first_woy takes the value of first week of the year.

Let us see this example code on uses of DateDiff to find out difference in months between two dates.
 

The output of the above by changing the value of date_type we can find out the difference in days, years, weeks etc. Table for different date_type values

Value	Meaning
"yyyy"	Year
"m"	Month
"d"	Day
"h"	Hour
"n"	Minute
"s"	Second
"w"	Weekday
"ww"	Week of the year
"q"	Quarter

 

Collecting parts of Date by using DatePart function

We can collect part of the date like year, month, day, date, Weekday etc from date by using DatePart function in VBScript used in ASP. We can extract the required date portion from the full date or date variable. Here is the syntax of the DatePart function.
 

DatePart(date_type, date)

Here date_type is the type of date part we want to get like Day, month, year, week etc. date is the date variable or a fixed date figure. Here is the code to display month part from today's date.
 

Dim d_today
d_today=Now
Response.Write DatePart("m",d_today)
 

Above code will return month in number for today's date. By changing date_type argument to different values we can get year, day , day of the year etc by using this function.

Let us try to collect year from a fixed date . Here is the example

Response.Write DatePart("yyyy",#09/10/2003#)

We will get an out put of 2003

We can also get the Date, Month or year by using Day(date), Month(date) and Year(date) function respectively. For example
 

This will give 2003 as output.

Month(#10/15/2003#)

This will give 10 as output.
 

This will give 15 as output.
 

Getting Name of the Month by entering month number

We can get the months name by using the month number by using MonthName() function.
Here is the syntax for MonthName function.
 

Output of the above code is October.

It can take one more optional argument to return month name in long or short format. By default it is set to False
 

MonthName(10,False)

This will return October
 

This will return Oct

Getting Weekday names by using WeekDay and WeekDayName functions in ASP

From a date variable or from a date we can get the weekday number staring from Sunday as 1 and Saturday as 7 ( see the table at the end ) by using weekday() function. Here is the syntax of weekday function.

WeekDay(#7/25/2006#)

Here we have taken one date but we can also use any date variable as input to the WeekDay function. Like this …
 

Here d_mydate is a date variable and we can assign any date value to it.

The output of this function will be between 1 and 7 depending on the weekday of the input value. The example
 

The output of above line is 3. It represents Tuesday of the week. To get directly the name of the weekday we can use WeekDayName() function. This function takes the number of weekday and returns the name of the weekday. Here is the syntax of WeekDayName() function

Here weekday_number is the variable holding the weekday number, type is an optional Boolean argument to specify long or short name of the weekday to be returned. False value of type returns Long name and True value returns short name. By default it is set to False. Here are some examples of WeekDayName function.