xslt date conversion to UTC - xslt

Question

I am very new to xslt programming. Can any one help with this:
input xml:
<?xml version="1.0" encoding="UTF-8"?>
<MESSAGE>
<ER>
<MXITEMOUT xmlns="http://www.mro.com/mx/integration" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" language="EN">
<Header operation="Notify" event="1">
<SenderID type="MAXIMO" majorversion="6" minorversion="0" build="02" dbbuild="V600-76">MX</SenderID>
<CreationDateTime>2005-08-15T14:28:06-05:00</CreationDateTime>
<RecipientID>EXTSYS1234</RecipientID>
<MessageID>1124</MessageID>
</Header>
<Content>
<MXITEM>
<ITEM action="Add">
<ITEMNUM>I1001</ITEMNUM>
<DESCRIPTION langenabled="1">test item</DESCRIPTION>
<ROTATING>1</ROTATING>
<LOTTYPE maxvalue="NOLOT">NOLOT</LOTTYPE>
<CAPITALIZED>0</CAPITALIZED>
<CREATEDDATE>2014-05-22T13:00:46+10:00</CREATEDDATE>
</ITEM>
</MXITEM>
</Content>
</MXITEMOUT>
</ER>
<IR>
<MXITEMOUT xmlns="http://www.mro.com/mx/integration" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" language="EN">
<Header operation="Notify" event="1">
<SenderID type="MAXIMO" majorversion="6" minorversion="0" build="02" dbbuild="V600-76">MX</SenderID>
<CreationDateTime>2005-08-15T14:28:06-05:00</CreationDateTime>
<RecipientID>EXTSYS1234</RecipientID>
<MessageID>1124</MessageID>
</Header>
<Content>
<MXITEM>
<ITEM action="Add">
<ITEMNUM>I1001</ITEMNUM>
<DESCRIPTION langenabled="1">test item</DESCRIPTION>
<ROTATING>1</ROTATING>
<LOTTYPE maxvalue="NOLOT">NOLOT</LOTTYPE>
<CAPITALIZED>0</CAPITALIZED>
<CREATEDDATE>2014-05-22T13:00:46+10:00</CREATEDDATE>
</ITEM>
</MXITEM>
</Content>
</MXITEMOUT>
</IR>
</MESSAGE>
My XSLT is:
<?xml version="1.0"?>
<!--
This XSL is supposed to change the ITEMNUM tag value by prepending 001 to the existing value.
It also strips off the MESSAGE and IR wrapper tags so that the resultant data is consistent with
our XML schema
-->
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:mro="http://www.mro.com/mx/integration" version="1.0" exclude-result-prefixes="mro">
<xsl:template match="/MESSAGE">
<xsl:apply-templates select="IR"/>
</xsl:template>
<xsl:template match="IR">
<xsl:apply-templates select="#*|*|text()"/>
</xsl:template>
<xsl:template match="#*|*|text()">
<xsl:copy>
<xsl:apply-templates select="#*|*|text()"/>
</xsl:copy>
</xsl:template>
<!--
Change the ITEMNUM tag value by prepending 001 to the existing value
-->
<xsl:template match="mro:ITEMNUM">
<xsl:element name="ITEMNUM" namespace="http://www.mro.com/mx/integration">
<xsl:text>MAX-</xsl:text><xsl:value-of select="."/>
</xsl:element>
</xsl:template>
</xsl:stylesheet>
Current output is:
<?xml version="1.0" encoding="UTF-8"?>
<MXITEMOUT xmlns="http://www.mro.com/mx/integration" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" language="EN">
<Header operation="Notify" event="1">
<SenderID type="MAXIMO" majorversion="6" minorversion="0" build="02" dbbuild="V600-76">MX</SenderID>
<CreationDateTime>2005-08-15T14:28:06-05:00</CreationDateTime>
<RecipientID>EXTSYS1234</RecipientID>
<MessageID>1124</MessageID>
</Header>
<Content>
<MXITEM>
<ITEM action="Add">
<mro:ITEMNUM xmlns:mro="http://www.mro.com/mx/integration">MAX-I1001</mro:ITEMNUM>
<DESCRIPTION langenabled="1">test item</DESCRIPTION>
<ROTATING>1</ROTATING>
<LOTTYPE maxvalue="NOLOT">NOLOT</LOTTYPE>
<CAPITALIZED>0</CAPITALIZED>
<CREATEDDATE>2014-05-22T13:00:46+10:00</CREATEDDATE>
</ITEM>
</MXITEM>
</Content>
</MXITEMOUT>
Expected output is:
<?xml version="1.0" encoding="UTF-8"?>
<MXITEMOUT xmlns="http://www.mro.com/mx/integration" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" language="EN">
<Header operation="Notify" event="1">
<SenderID type="MAXIMO" majorversion="6" minorversion="0" build="02" dbbuild="V600-76">MX</SenderID>
<CreationDateTime>2005-08-15T14:28:06-05:00</CreationDateTime>
<RecipientID>EXTSYS1234</RecipientID>
<MessageID>1124</MessageID>
</Header>
<Content>
<MXITEM>
<ITEM action="Add">
<mro:ITEMNUM xmlns:mro="http://www.mro.com/mx/integration">MAX-I1001</mro:ITEMNUM>
<DESCRIPTION langenabled="1">test item</DESCRIPTION>
<ROTATING>1</ROTATING>
<LOTTYPE maxvalue="NOLOT">NOLOT</LOTTYPE>
<CAPITALIZED>0</CAPITALIZED>
<CREATEDDATE>2014-05-22T23:00:46.000Z</CREATEDDATE>
</ITEM>
</MXITEM>
</Content>
</MXITEMOUT>
I am trying find logic in google to convert date to utc format in xslt.
It is throwing strange errors.
XML date:2014-05-22T13:00:46+10:00 Expected Date: 2014-05-22T23:00:46.000Z