Overriding the default locale for DRL date parsing should be possible: PackageBuilder.dateFormats should be settable

    public PackageBuilder( Package pkg,
            PackageBuilderConfiguration configuration ) {
        this.dateFormats = null;//(DateFormats) this.environment.get( EnvironmentName.DATE_FORMATS );
        if (this.dateFormats == null) {
            this.dateFormats = new DateFormatsImpl();
            //this.environment.set( EnvironmentName.DATE_FORMATS , this.dateFormats );
        }