override date module function for label strings changes I configured a exposed filter for a shipping date field on myview with operator "Is between".
I saw two labels,"Start date" and "End date" in myview form.
I wanna change these strings to "From Date: " and "To Date: ".

I have checked the file sites/all/modules/date/date_views/includes/date_views_filter_handler_simple.inc 
This file includes the 

function date_parts_form()


that includes the codes: 

$label = t('Start date');


and 

$label = t('End date');


But I don't want to modify this file directly for further maintenance.
I am not certain how to override this function with keeping an original module file.
Please show me the way with circumstantial directory path and file name.
Now I use an Omega sub theme, mytheme. I added to a CSS file, mytheme-alpha-default.css, some styles such as the following:

label {display:none;}
div.some:before {content:"To Date: "; display:block; margin-left: 2.0em;}