Formatting date time using XSLT - datetime

Question

I have a requirement in which I have to format the date value in the incoming request. I am able to extract the value however it is not getting properly formatted.
Below is the Input request:
<soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/">
<soapenv:Header/>
<soapenv:Body>
<Invoice Version="3.0">
<Header>
<ThisDocumentIdentifier>
<DocumentIdentifier>0000001007128564</DocumentIdentifier>
</ThisDocumentIdentifier>
<ThisDocumentDateTime>
<DateTime DateTimeQualifier="On">20140429T031659Z</DateTime>
</ThisDocumentDateTime>
</Header>
</Invoice>
</soapenv:Body>
</soapenv:Envelope>
The Date value is 20140429T031659Z
Output needed 2014-04-29T03:16:59Z
Below is the code:
<?xml version="1.0" encoding="UTF-8"?>
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:fo="http://www.w3.org/1999/XSL/Format" xmlns:dp="http://www.datapower.com/extensions">
<xsl:template match="*[local-name()='DateTime']">
<xsl:variable name="FormatDatetime">
<xsl:value-of select="concat(substring(., 1, 4), '-', substring(., 5, 2), '-', substring(., 7, 2),substring(.,9,2),':',substring(.,11,2),':',substring(.,13,2),'Z')"/>
</xsl:variable>
<xsl:message dp:priority="debug"> Formatted date= <xsl:value-of select="$FormatDatetime"/>
</xsl:message>
</xsl:template>
</xsl:stylesheet>
This is the output I am getting
2014-04-29T0:31:65Z
For some reason one of the number is getting removed and I am not sure why?
Can anyone please advise where I am doing it wrong?
I have added the 'T' as well.
<xsl:value-of select="concat(substring(., 1, 4), '-', substring(., 5, 2), '-', substring(., 7, 2),'T',substring(.,9,2),':',substring(.,11,2),':',substring(.,13,2),'Z')"/>
Got the output as
2014-04-29TT0:31:65Z
This is the updated working code thank to panhandel.
<?xml version="1.0" encoding="UTF-8"?>
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:fo="http://www.w3.org/1999/XSL/Format" xmlns:dp="http://www.datapower.com/extensions">
<xsl:template match="*[local-name()='DateTime']">
<xsl:variable name="FormatDatetime">
<xsl:value-of select="concat(substring(., 1, 4), '-', substring(., 5, 2), '-', substring(., 7, 2),substring(.,9,3),':',substring(.,11,2),':',substring(.,13,2),'Z')"/>
</xsl:variable>
<xsl:message dp:priority="debug"> Formatted date= <xsl:value-of select="$FormatDatetime"/>
</xsl:message>
</xsl:template>
</xsl:stylesheet>

Answer 1

Looks like you shorted the T03 part by one character by using substring(.,9,2).
It should be substring(.,9,3)