adjustMonth (DateTime - Java)

Increments a date-time by the number of months you specify.

Defined in



public void adjustMonth(int n)
    throws NotesException
public void adjustMonth(int n, boolean preservelocaltime)
    throws NotesException


int n

The number of months by which to increment the date-time. Can be positive or negative.

boolean preservelocaltime

Affects adjustments that cross a daylight-saving time boundary. Specify true to increment or decrement the GMT time by one hour such that a 24-hour adjustment yields the same local time in the new day. If this parameter is false or omitted, GMT time remains as adjusted and local time gains or loses an hour.


If the DateTime object consists of only a time component, this method has no effect.

The number of months by which you increment a DateTime object can cause the year to be incremented. For example, if the adjustment is +12, the date component changes to the next calendar year.