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# DateTime Sub

Kalipso - Form - Expressions - Functions - Functions Descriptions - Date Functions - DateTime Sub

This Function returns a *\<string>*, which is the date time resultant of the subtraction between the specified **Date Time** and **Value**.

### Parameters

* **Date Time** *\<string> -* Date Time to subtract the **Value** from. This parameter must be in format YYYYMMDDHHMISSCCC.
* **Value Unit** *\<string> -* Unit of **Value** to subtract from **Date Time**. The Possible values for this parameter are:
  * "S" - Second
  * "M" - Minute
  * "H" - Hour
  * "D" - Day
  * "HHMMSS" - Time
  * "DDHHMMSS" - Date Time
* **Value** *\<string> -* Value to subtract from Date Time. The unit of this parameter depends on the Value Unit.

### **Examples**

* *Example 1*

DateTimeSub("20100301091530000", "D", "1")\
**Result** = 20100228091530000

* *Example 2*

DateTimeAdd("20100301091530000", "HHMMSS", "010000")\
**Result** = 20100301081530