Date (Type of variable)

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Declaration and initialization
Properties available for the dates
Range of dates

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Date (Type of variable)

In french: Date

The Date type is used to easily handle the dates. This type is used to manage the conversions almost automatically (StringToDate, DateToString, IntegerToDate, DateToInteger, ...).

This type can be used:

to retrieve and handle the HFSQL items in Date format.
to retrieve and handle the Date edit controls.
in the WLanguage functions used to manage the dates.
to perform calculations on dates (difference, addition, ...). For more details, see Operations that can be performed on the Date type.

Remarks:

Several properties can be used with the Date type, to retrieve part of the date for example.
For more details on the declaration of this type of variable and the use of WLanguage properties, see Declaring a variable.

Versions 16 and later

This type of variable is now available for Windows Phone applications.

New in version 16

This type of variable is now available for Windows Phone applications.

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 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 Date = 1205
EndDate is Date = "20011231" // 31/12/2001
TodaysDate is Date = DateSys()

Remarks

Declaration and initialization

A Date variable can be initialized with a value whose type is:

Date
DateTime: only the date will be taken into account.
Character string, in YYYYMMDD format (YYYY: year, MM: Month, DD: Day)
Integer: the date will correspond to the number of days passed between January 1st 1800 and the specified date.

By default, a Date variable is initialized with today's date (system date). 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 Date variable with the system date by using Now.

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

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

Properties available for the dates

The following properties can be used on the dates:


Year	Returns or modifies the year of the specified date (in integer format).
Day	Returns or modifies the day of the specified date (in integer format).
Month	Returns or modifies the month of the specified date (in integer format).

For more details on the possible operations on dates (add, subtract, compare), see Operations that can be performed on the Date type.

StartDate is Date = "20011201"
// Adds 5 years to the date
StartDate.Year += 5
// Modifies the month
StartDate.Month = 5
// Calculates the end (30 days later)
let EndDate = StartDate
EndDate.Month++
EndDate.Day--

Range of dates

The Date type allows you to manage the dates included between 01/01/0001 and 12/31/9999.

Remark: The calculations performed on dates by the WLanguage functions or the WLanguage properties are accurate from January 1st 1583.

Related Examples:

Unit examples (WINDEV Mobile): Management of dates

[ + ] Using the Date type and the WLanguage functions for handling dates.