(Eveny Theme) Change header Color and date format

I am trying to change the header section of my page to white. Nothing I have tried worked. Please help… also, the theme is from a country where they use day month year. I want it to be month day year but could not find how to change it. please help.

Here is the header code

<!– Custom header on front page template –>

<header id=”masthead” class=”site-header” role=”banner”>
<div class=”container clear”>
<div class=”site-header__wrapper”>

<div class=”site-branding”>

<!– Logo –>
<h1 class=”site-title”>Ode To September 11</h1>
<h2 class=”site-description”>”We Remember”</h2>

</div><!– .site-branding –>

<nav id=”site-navigation” class=”main-navigation” role=”navigation”>
<button class=”menu-toggle” aria-controls=”menu” aria-expanded=”false”><span class=”menu-icon”></span></button>

<div class=”menu-container”>

<i class=”icon-close”></i>

<!– PRIMARY NAVIGATION –>
<div class=”menu verticalize-container”><ul id=”navigation” class=”verticalize”><li id=”menu-item-45″ class=”menu-item menu-item-type-custom menu-item-object-custom menu-item-home menu-item-45″>Home
<li id=”menu-item-44″ class=”menu-item menu-item-type-custom menu-item-object-custom current-menu-item menu-item-44″>Events
<li id=”menu-item-74″ class=”menu-item menu-item-type-post_type menu-item-object-page menu-item-74″>Artist
<li id=”menu-item-200″ class=”menu-item menu-item-type-post_type menu-item-object-page menu-item-200″>Albums
<li id=”menu-item-332″ class=”menu-item menu-item-type-custom menu-item-object-custom menu-item-332″>Tickets
<li id=”menu-item-42″ class=”menu-item menu-item-type-post_type menu-item-object-page menu-item-42″>Contact Us
</div>
</div><!– .menu-container –> </nav><!– #site-navigation –>

</div>
</div><!– .container –>
</header><!– #masthead –>

<div id=”content” class=”site-content”>

<div class=”container”>
<div class=”row”>

<div id=”primary” class=”content-area col-lg-12″>
<main id=”main” class=”site-main” role=”main”>

<article id=”post-37″ class=”clear post-37 event type-event status-publish format-standard has-post-thumbnail hentry”>

<figure class=”featured-image”>
<img src=”https://i0.wp.com/www.odetoseptember11.com/wp-content/uploads/2015/07/events_img.png?fit=630%2C99999&#8243; class=”attachment-event-thumb wp-post-image” alt=”A Tribute to September 11, 2001″ /> </figure>

<div class=”event-content-wrapper”>

<!– BUY TICKETS & GET DIRECTIONS –>

<header class=”entry-header”>

<!– EVENT META –>
<time class=”no-time”>
11/09/15 </time>
<div class=”event-time”>
<!– Start & End time –>

<!– Print text message if Event has passed –>

</div><!– .event-time –>

<h1 class=”entry-title”>“We Remember” A Tribute to September 11, 2001</h1><address>Our Lady of Perpetual Help Auditorium, 5902 6th Avenue, Brooklyn, New York 11220</address>
</header><!– .entry-header –>