Sencha extjs disable year in datepicker with monthfield

You can use the Ext.picker.Date to set the years disabled. The years can be selectable in the picker dropdown but the dates will be disabled for the entire year(s).

Ext.application({
    name : 'Fiddle',

    launch : function() {

        Ext.create('Ext.form.Panel', {
            renderTo: Ext.getBody(),
            width: 300,
            bodyPadding: 10,
            title: 'Dates',
            items: [{
                xtype: 'datefield',
                anchor: '100%',
                fieldLabel: 'From',
                name: 'from_date',
                listeners:{
                    afterrender: function(datefield){
                        var datePicker = datefield.getPicker();
                        datePicker.setDisabledDates(['../../2016','../../2017','../../2018','../../2019']);
                    }
                }
            }]
        });
    }
});