Tutorial

Getting Started with Macros

Macro Editor

User Interface

Menus and Toolbar

Editing Macro Statements

Expression Editor

Macro Debugging

How To

Using variables

Finding and modifying objects

Creating new page content

Asking for user input

Storing persistent data

Sorting objects

Macro menus

Sample Macros

Concepts

Expressions

Objects

Properties

Variables

Data Types

Arrays

Functions

Literals

Operators

Comments

Last updated on: November 25, 2022
Also available as a single HTML file

Onetastic Macro Documentation > Functions > Date/Time Functions > DateTime_Subtract

DateTime_Subtract

Returns a new date/time value by subtracting the given time span from the given date/time value. It can also be used to subtract two date/time values to find the difference between them as a time span value.

Syntax

Mixed DateTime_Subtract(
	DateTime date, 
	Mixed dateOrTimespan)

Parameters

DateTime date
Date/time value to add to.
Mixed dateOrTimespan
Time span amount to subtract, or second date/time value to find the difference.

Examples

$now = DateTime_Now() // Find 3 hours earlier $threeHoursEarlier = DateTime_Subtract($now, TimeSpan(3, "hour")) // Find the difference between them $diff = DateTime_Subtract($now, $threeHoursEarlier) // $diff is 3 hours

Reference

Statements

For

ForEach

If

Else If

Else

Switch

Case

Default

While

Expression

Comment

Break

Continue

Return

Hierarchy Objects

NotebookRoot

Notebook

SectionGroup

Section

Page

Page Objects

Title

Outline

Table

Column

Row

Cell

Paragraph

Text

Image

EmbeddedFile

Tag

Other Objects

DialogBox

MacroMenu

Functions

Array Functions

Color Functions

Data Store Functions

Date/Time Functions

Dialog Box Functions

Macro Execution Functions

Macro Menu Functions

Object Functions

String Functions