Date :: addMonths - Add months to date value
The number of months passed in iMonths is added to the date value. Year may change, when month exceeds 12. Usually, day remains unchanged, but will be adjusted, when the new month value does not have the resulting day
Date date(31,1,2009);
date.addMonths(1); // day becomes: 2009-28-2
Return value: Date ( odaba::Date & )
The date contains day, month and year, but not the time.