OpenWGA 7.10 - TMLScript reference

Method :

modifyDate(date, unit, amount)

On object WGA
Usage Modifies a date by adding/substracting a certain timespan.

DEPRECATED since 7.10.1. Use WGA.Date().modify() instead.


This is a utility method for simple modifications to dates without the use of WGA.createCalendar(). it returns a new date object which represents the date of the parameter "date" plus/minus a given timespan.

In order to add a timespan one is first to choose which time unit to use via argument "unit" and then the amount of units to add via argument "amount". In order to substract a timespan from the date a negative amount value is to be used.

The unit is determined by the date string character that would be used by WGA.format() or WGA.parseDate() to display the time unit.


date (Date):

Date to modify

unit (String):

Character determining the date unit to add:

"d" or "D" - Day
"M" - Month
"w" or "W" - Week
"y" - Year
"H" or "h" - Hour
"m" - Minute
"s" - Second
"S" - Millisecond

amount (Number):

Amount of date units to add to the date. Negative amounts effectively substract the unit.

Return value The modified Date
Allowed in script types
  • WebTML pages and normal WebTML actions
  • Master actions
  • TMLScript tasks in jobs
  • Content type events

Adding 2 weeks to a date:

WGA.modifyDate(date, "w", 2);

Substracting 6 months from a date:

WGA.modifyDate(date, "M", -6);