Expected Behavior:

text_date show calendar correctly

Actual Behavior:

text_date show calendar strangely when change wordpress language to Simplified Chinese

Steps to reproduce (I have confirmed I can reproduce this issue on the trunk branch):

1. At wordpress admin Settings -> General page, change the language to Simplified Chinese
2. use date picker, the calendar doesn't show correctly

CMB2 Field Registration Code:

add_action( 'cmb2_admin_init', 'yourprefix_register_demo_metabox' );
function yourprefix_register_demo_metabox() {

	$cmb = new_cmb2_box( array(
		// Box Config...
	) );

	$cmb->add_field( array(
		// Field Config...
	) );

	// Additional fields...
}