DateTime (Type of variable)

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Declaration and initialization
Properties that can be used on the DateTime variables
Interval of data

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DateTime (Type of variable)

In french: DateHeure

The DateTime type is used to easily handle a date and a time. The DateTime type can be used to perform calculations (subtraction, addition, ...) on the dates, times and durations. See Operations that can be performed on the DateTime type for more details.

Remarks:

Several properties can be used with the DateTime type, to retrieve the date or the time, a part of the date or a part of the time.
See Declaring a variable for more details on the declaration of this type of variable and the use of WLanguage properties.

Versions 17 and later

This type of variable is now available for iPhone/iPad applications.

New in version 17

This type of variable is now available for iPhone/iPad applications.

Versions 18 and later

This type of variable is now available in Windows Store apps mode.

This type of variable is now available in Android Widget mode.

New in version 18

This type of variable is now available in Windows Store apps mode.

This type of variable is now available in Android Widget mode.

This type of variable is now available in Windows Store apps mode.

This type of variable is now available in Android Widget mode.

Versions 20 and later

This type of variable is now available in browser code.

New in version 20

This type of variable is now available in browser code.

Versions 21 and later

This type of variable is now available in Universal Windows 10 App mode.

This type of variable is now available in Apple Watch mode.

New in version 21

This type of variable is now available in Universal Windows 10 App mode.

This type of variable is now available in Apple Watch mode.

This type of variable is now available in Universal Windows 10 App mode.

This type of variable is now available in Apple Watch mode.

Example

StartDate is DateTime = "200112311524" // 31/12/2001 at 15:24

Remarks

Declaration and initialization

A DateTime variable can be initialized with a value of the following type:
- Date: the hours and the minutes will be initialized to 0.
- DateTime
- Character string, in the following format
  - YYYYMMDD
  - YYYYMMDDHH
  - YYYYMMDDHHmm
  - YYYYMMDDHHmmSS
  - YYYYMMDDHHmmSSCC
  - YYYYMMDDHHmmSSCCC
    (YYYY: year, MM: month, DD: Day, HH: hour, mm: minutes, SS: seconds, CC: hundredths of a second, CCC: Thousandths of a second)
By default, a DateTime variable is initialized with today's date (system date) and with the system time. To define the default value assigned to the Date, Time and DateTime variables, use DateTimeByDefault.

Versions 19 and later
Remark: You also have the ability to initialize a DateTime variable with the system date and time by using Now.

New in version 19
Remark: You also have the ability to initialize a DateTime variable with the system date and time by using Now.

Remark: You also have the ability to initialize a DateTime variable with the system date and time by using Now.

Properties that can be used on the DateTime variables


Year	Returns or modifies the year of the specified date (in integer format).
Time	Returns or modifies the hour (in integer format).
Day	Returns or modifies the day of the specified date (in integer format).
Millisecond	Returns or modifies the number of milliseconds (in integer format).
Minute	Returns or modifies the number of minutes (in integer format).
Month	Returns or modifies the month of the specified date (in integer format).
Date	Returns or modifies the date of the DateTime variable (in date format).
Time	Returns or modifies the time of the DateTime variable (in time format).
Second	Returns or modifies the number of seconds (in integer format).

StartDate is DateTime = "200112011530"
// Adds 5 years to the date
DateStart.Year += 5
// Modifies the month
StartDate Month = 5
// Displays the date
Info("HEX@ " + HEX@ Part.Start.HEX@)
// Displays the time
Info("Time " + StartDate PartTime)

Interval of data

The DateTime type is used to manage data included between 01/01/0001 at 00:00 and 12/31/9999 at 23:59.

Related Examples:

Unit examples (WINDEV): Calculations on durations

[ + ] Calculations on dates and times with the WLanguage functions:
- Calculate the duration between two moments (dates and times)
- Calculate a sum of durations
- Calculate an average of durations