diff --git a/schedule/ics.php b/schedule/ics.php
index f715547..db57d5f 100644
--- a/schedule/ics.php
+++ b/schedule/ics.php
@@ -3,6 +3,10 @@ $from = gmdate("Y-m-d\T00:00:00\Z", strtotime(date("w") ? "last sunday" : "sunda
 $to   = gmdate("Y-m-d\T00:00:00\Z", strtotime(date("w") ? "sunday" : "next sunday"));
 include 'schedule.php';
 
+function ics_formatdate($date) {
+    return gmdate("Ymd\THis\Z", strtotime($date));
+}
+
 // ICS generation. Here be dragons.
 // I created the file using a Python script and reverse-engineered it to figure this out.
 
@@ -15,17 +19,17 @@ define("ICS_EOL","\r\n");
 echo "BEGIN:VCALENDAR".ICS_EOL;
 echo "VERSION:2.0".ICS_EOL;
 echo "PRODID:tilderadio schedule".ICS_EOL;
-echo "DTSTAMP:".formatdate("now").ICS_EOL;
+echo "DTSTAMP:".ics_formatdate("now").ICS_EOL;
 
 foreach ($schedule as $event) {
 	// The VEVENT structure's pretty easy to generate, especially since we're already in UTC.
 	echo "BEGIN:VEVENT".ICS_EOL;
 	// First, we need a creation date.
 	// Just go with now.
-	echo "DTSTAMP:".formatdate("now").ICS_EOL;
+	echo "DTSTAMP:".ics_formatdate("now").ICS_EOL;
 	// Next, the event start and end.
-	echo "DTEND:".formatdate($event["end"]).ICS_EOL;
-	echo "DTSTART:".formatdate($event["start"]).ICS_EOL;
+	echo "DTEND:".ics_formatdate($event["end"]).ICS_EOL;
+	echo "DTSTART:".ics_formatdate($event["start"]).ICS_EOL;
 	// Next, the recurrence rule.
 	// We assume the format is weekly. (No DJs have requested any other frequency yet.)
 	echo "RRULE:FREQ=WEEKLY".ICS_EOL;