diff --git a/html_calendar.xsl b/html_calendar.xsl
index f99a877..bf98738 100755
--- a/html_calendar.xsl
+++ b/html_calendar.xsl
@@ -224,7 +224,7 @@
 	<xsl:template match="lecture[node() and not(@holiday)]">
 		<TD CLASS="ltgrey-center">
 			<DIV CLASS="small">
-				<xsl:number value="1 + count(preceding::lecture[node()])"/>
+				<xsl:number value="1 + count(preceding::lecture[node() and not(@holiday)])"/>
 			</DIV>
 		</TD>
 		<TD CLASS="ltgrey-left" ROWSPAN="1">