Need to filter out old data from existing XML document

I had an existing XML document that is bout to an html table, and once a month the document is replaced on site server. XML file contains dated events, and I need to remove all events that have dates older then current date when page is loading and retrieving data from xml document.

Here is an sample of the xml data.

    <root>
    <event>
    <date>02/01/2015</date>
    <name>Mosaic Singers in Concert</name>
    <organization>Cathedral of the Most Blessed Sacrament, 9844 Woodward Avenue, Detroit</organization>
    <time>4:00 p.m.</time>
    <description>An afternoon concert of diverse choral music. The young and energetic Mosaic Singers, just back from an international tour, won a gold medal and two silver medals at the 2014 World Choir Games in Latvia.
    Doors open 45 minutes before each concert. Free, secure parking is adjacent to the Cathedral. • http://ift.tt/1LXPmAK Tickets at: http://ift.tt/1EAws0G • $10 general admission</description>
    <phone/>
    <category>Arts &amp; Entertainment</category>
    <highlightedevent>Yes</highlightedevent>
    <address1/>
    <address2/>
    <city/>
    <zip/>
    <county/>
    </event>

    <event>
    <date>02/14/2015</date>
    <name>Nancy Honeytree in Concert</name>
    <organization>Faith Christian, 25201 W. Outer Drive, Melvindale</organization>
    <time>6:00 p.m.</time>
    <description>A romantic night and time of refreshing. Enjoy a wonderful dinner by candlelight and concert from this musical legend. • http://ift.tt/1LXPmAN; 313.928.8305 • $25 per couple</description>
    <phone/>
    <category>Special Events</category>
    <highlightedevent>Yes</highlightedevent>
    <address1/>
    <address2/>
    <city/>
    <zip/>
    <county/>
    </event>
    </root>