Date & Time column display strange value in disp form

Use something like:

<xsl:value-of select="ddwrt:FormatDate(@ArticleStartDate, 1033, 3)"/>  Change 1033 to you LocalID and the second number is a format specifier. See here for possible values.

Make sure you have the ddwrt namespace reference xmlns:ddwrt="http://schemas.microsoft.com/WebParts/v2/DataView/runtime" in the top of your xsl.