diff --git a/iiif-online-workshop/April2026.md b/iiif-online-workshop/April2026.md
index 841d3474..69f457b2 100644
--- a/iiif-online-workshop/April2026.md
+++ b/iiif-online-workshop/April2026.md
@@ -1,9 +1,3 @@
-<script src="https://cdnjs.cloudflare.com/ajax/libs/jstimezonedetect/1.0.7/jstz.min.js" integrity="sha512-pZ0i46J1zsMwPd2NQZ4IaL427jXE2RVHMk3uv/wPTNlBVp9AbB1L65/4YdrXRPLEmyZCkY9qYOOsQp44V4orHg==" crossorigin="anonymous"></script>
-<script src="https://cdnjs.cloudflare.com/ajax/libs/dayjs/1.9.3/dayjs.min.js" integrity="sha512-u7elBfdMr+7LhU4rvUk3IM28QZDKTyUxba4Nx2IJ1W9cj4shfRSPq7EZXD2ULD9cBoizw2FQyeR6YBog6LcnHg==" crossorigin="anonymous"></script>
-<script src="https://cdnjs.cloudflare.com/ajax/libs/dayjs/1.9.3/plugin/utc.min.js" integrity="sha512-+lztPB4upMyG9pLdOWl8MFsBhXM1V9vFTDhXV3/4VSdoqpR5RfA2bNdrl8n0F9HmbzFkNqmOBdZw580qfRU01Q==" crossorigin="anonymous"></script>
-<script src="https://cdnjs.cloudflare.com/ajax/libs/dayjs/1.9.3/plugin/timezone.min.js" integrity="sha512-3QnyXIdU85C6rOXhHzVsXinI5/qM/LniMr5actNRUwyp1Tuurw7rOn7fX7WWoNyZuM7KlQxITGQI4ITCgXKGQA==" crossorigin="anonymous"></script>
-<script src="https://cdnjs.cloudflare.com/ajax/libs/dayjs/1.9.3/plugin/advancedFormat.min.js" integrity="sha512-bvTLx3e7Wk8qIAqr7O/vbk8IT2h+tFr1udHdJGzX6xMGtruTSCBctN0IGGjozmwap+l1A3zIz5KZUXI9IiBS3Q==" crossorigin="anonymous"></script>
-<script src="https://cdnjs.cloudflare.com/ajax/libs/dayjs/1.9.3/plugin/localizedFormat.min.js" integrity="sha512-85aup/PuxBbkUL6yEpshXfwrOWNt7rvFzFrfvYgnrBBQK2r1FEyqD+5qGVNPWSm8xxafm3mhBOvd975HBSaXNA==" crossorigin="anonymous"></script>
 <script type="text/javascript" src="js/setupIntro.js"></script>
 
 <div id="workshop-config" data-start="2026-04-13 17:00"></div>
@@ -68,15 +62,6 @@ Tasks to be completed __before__ the meeting:
 There is also a course Google calendar available which you can subscribe to:
 <div id="calendar-container"></div>
 
-<script type="text/javascript">
-  var timezone = jstz.determine();
-  console.log('Name is ' + timezone.name());
-  var pref = '<iframe src="https://calendar.google.com/calendar/embed?src=clir.org_chugpdurgjm9njridh8uq676n0%40group.calendar.google.com&mode=WEEK&title=IIIF%20Online%20Workshop&dates=20260413/20260417&showTabs=0&ctz=';
-  var suff = '" style="border: 0" width="100%" height="300" frameborder="0" scrolling="no"></iframe>';
-  var iframe_html = pref + timezone.name() + suff;
-  document.getElementById('calendar-container').innerHTML = iframe_html;
-</script>
-
 You can also download a <a href="ics/April2026.ics">ICS version</a>.
 
 ## Project Work 
@@ -97,49 +82,3 @@ IIIF Technical Coordinator<br/>
 International Image Interoperability Framework (IIIF) Consortium<br/>
 http://iiif.io<br/>
 
-<script type="text/javascript">
-    console.log('Working out times ');
-    dayjs.extend(dayjs_plugin_utc)
-    dayjs.extend(dayjs_plugin_timezone)
-    dayjs.extend(dayjs_plugin_advancedFormat)
-    var timezone = jstz.determine();
-    function setTime(time, section) {
-        console.log("Setting time in " + section);
-        var local = time.tz(timezone.name());
-
-        var span = document.getElementById(section);
-        span.innerHTML = local.format("h:mma z")
-    }
-    function setDay(time, section) {
-        console.log("Setting time in " + section);
-        var local = time.tz(timezone.name());
-
-        var span = document.getElementById(section);
-        span.innerHTML = local.format("dddd, MMMM D")
-        if (local.format("D").endsWith("0")) {
-            span.innerHTML += "th";
-        } else if (local.format("D").endsWith("1") && !(local.format("D").endsWith("11"))) {
-            span.innerHTML += "st";
-        } else if (local.format("D").endsWith("2") && !(local.format("D").endsWith("12"))) {
-            span.innerHTML += "nd";
-        } else if (local.format("D").endsWith("3") && !(local.format("D").endsWith("13"))) {
-            span.innerHTML += "rd";
-        } else {    
-            span.innerHTML += "th";
-        }
-    }
-    function setDates(time, day, timeId) {
-        setDay(time,day);
-        setTime(time,timeId);
-
-    }
-
-
-    setDates(dayjs.tz("2026-04-13 17:00", "Europe/London"),"day1", "intro");
-    setDates(dayjs.tz("2026-04-14 17:00", "Europe/London"),"day2", "image");
-    setDates(dayjs.tz("2026-04-15 17:00", "Europe/London"),"day3", "presentation");
-    setDates(dayjs.tz("2026-04-16 17:00", "Europe/London"),"day4", "annotations");
-    setDates(dayjs.tz("2026-04-17 17:00", "Europe/London"),"day5", "demos");
-    
-</script>
-
diff --git a/iiif-online-workshop/June2026.md b/iiif-online-workshop/June2026.md
index 654d99aa..b6783f59 100644
--- a/iiif-online-workshop/June2026.md
+++ b/iiif-online-workshop/June2026.md
@@ -1,11 +1,6 @@
-<script src="https://cdnjs.cloudflare.com/ajax/libs/jstimezonedetect/1.0.7/jstz.min.js" integrity="sha512-pZ0i46J1zsMwPd2NQZ4IaL427jXE2RVHMk3uv/wPTNlBVp9AbB1L65/4YdrXRPLEmyZCkY9qYOOsQp44V4orHg==" crossorigin="anonymous"></script>
-<script src="https://cdnjs.cloudflare.com/ajax/libs/dayjs/1.9.3/dayjs.min.js" integrity="sha512-u7elBfdMr+7LhU4rvUk3IM28QZDKTyUxba4Nx2IJ1W9cj4shfRSPq7EZXD2ULD9cBoizw2FQyeR6YBog6LcnHg==" crossorigin="anonymous"></script>
-<script src="https://cdnjs.cloudflare.com/ajax/libs/dayjs/1.9.3/plugin/utc.min.js" integrity="sha512-+lztPB4upMyG9pLdOWl8MFsBhXM1V9vFTDhXV3/4VSdoqpR5RfA2bNdrl8n0F9HmbzFkNqmOBdZw580qfRU01Q==" crossorigin="anonymous"></script>
-<script src="https://cdnjs.cloudflare.com/ajax/libs/dayjs/1.9.3/plugin/timezone.min.js" integrity="sha512-3QnyXIdU85C6rOXhHzVsXinI5/qM/LniMr5actNRUwyp1Tuurw7rOn7fX7WWoNyZuM7KlQxITGQI4ITCgXKGQA==" crossorigin="anonymous"></script>
-<script src="https://cdnjs.cloudflare.com/ajax/libs/dayjs/1.9.3/plugin/advancedFormat.min.js" integrity="sha512-bvTLx3e7Wk8qIAqr7O/vbk8IT2h+tFr1udHdJGzX6xMGtruTSCBctN0IGGjozmwap+l1A3zIz5KZUXI9IiBS3Q==" crossorigin="anonymous"></script>
-<script src="https://cdnjs.cloudflare.com/ajax/libs/dayjs/1.9.3/plugin/localizedFormat.min.js" integrity="sha512-85aup/PuxBbkUL6yEpshXfwrOWNt7rvFzFrfvYgnrBBQK2r1FEyqD+5qGVNPWSm8xxafm3mhBOvd975HBSaXNA==" crossorigin="anonymous"></script>
 <script type="text/javascript" src="js/setupIntro.js"></script>
- <div id="workshop-config" data-start="2026-06-22 14:00"></div>
+<div id="workshop-config" data-start="2026-06-22 14:00"></div>
+
 # Introduction
 
 Thank you for registering for the [IIIF Online Workshop](https://www.eventbrite.com/e/june-2026-iiif-online-training-5-day-course-tickets-1825949497099) between June 22nd to June 26th. This course is an adapted version of an in person workshop and it is the 7th time we have run it online.  
diff --git a/iiif-online-workshop/November2026.md b/iiif-online-workshop/November2026.md
index ac3955e6..f9b4eee4 100644
--- a/iiif-online-workshop/November2026.md
+++ b/iiif-online-workshop/November2026.md
@@ -1,12 +1,6 @@
-<script src="https://cdnjs.cloudflare.com/ajax/libs/jstimezonedetect/1.0.7/jstz.min.js" integrity="sha512-pZ0i46J1zsMwPd2NQZ4IaL427jXE2RVHMk3uv/wPTNlBVp9AbB1L65/4YdrXRPLEmyZCkY9qYOOsQp44V4orHg==" crossorigin="anonymous"></script>
-<script src="https://cdnjs.cloudflare.com/ajax/libs/dayjs/1.9.3/dayjs.min.js" integrity="sha512-u7elBfdMr+7LhU4rvUk3IM28QZDKTyUxba4Nx2IJ1W9cj4shfRSPq7EZXD2ULD9cBoizw2FQyeR6YBog6LcnHg==" crossorigin="anonymous"></script>
-<script src="https://cdnjs.cloudflare.com/ajax/libs/dayjs/1.9.3/plugin/utc.min.js" integrity="sha512-+lztPB4upMyG9pLdOWl8MFsBhXM1V9vFTDhXV3/4VSdoqpR5RfA2bNdrl8n0F9HmbzFkNqmOBdZw580qfRU01Q==" crossorigin="anonymous"></script>
-<script src="https://cdnjs.cloudflare.com/ajax/libs/dayjs/1.9.3/plugin/timezone.min.js" integrity="sha512-3QnyXIdU85C6rOXhHzVsXinI5/qM/LniMr5actNRUwyp1Tuurw7rOn7fX7WWoNyZuM7KlQxITGQI4ITCgXKGQA==" crossorigin="anonymous"></script>
-<script src="https://cdnjs.cloudflare.com/ajax/libs/dayjs/1.9.3/plugin/advancedFormat.min.js" integrity="sha512-bvTLx3e7Wk8qIAqr7O/vbk8IT2h+tFr1udHdJGzX6xMGtruTSCBctN0IGGjozmwap+l1A3zIz5KZUXI9IiBS3Q==" crossorigin="anonymous"></script>
-<script src="https://cdnjs.cloudflare.com/ajax/libs/dayjs/1.9.3/plugin/localizedFormat.min.js" integrity="sha512-85aup/PuxBbkUL6yEpshXfwrOWNt7rvFzFrfvYgnrBBQK2r1FEyqD+5qGVNPWSm8xxafm3mhBOvd975HBSaXNA==" crossorigin="anonymous"></script>
 <script type="text/javascript" src="js/setupIntro.js"></script>
 
- <div id="workshop-config" data-start="2026-11-23 10:00"></div>
+<div id="workshop-config" data-start="2026-11-23 10:00"></div>
 
 # Introduction
 
diff --git a/iiif-online-workshop/SUMMARY.md b/iiif-online-workshop/SUMMARY.md
index 38f32e05..07791ae4 100644
--- a/iiif-online-workshop/SUMMARY.md
+++ b/iiif-online-workshop/SUMMARY.md
@@ -100,10 +100,11 @@
   - [June 2024](editions/2024/June2024.md)
   - [November 2024](editions/2024/November2024.md)
   - [December 2024](editions/2024/December2024.md)
-- [March 2025](March2025.md)
-- [May 2025](May2025.md)
-- [September 2025](September2025.md)
-- [November 2025](November2025.md)
+- [2025 Editions](editions/2025/README.md)   
+  - [March 2025](editions/2025/March2025.md)
+  - [May 2025](editions/2025/May2025.md)
+  - [September 2025](editions/2025/September2025.md)
+  - [November 2025](editions/2025/November2025.md)
 - [April 2026](April2026.md)
 - [June 2026](June2026.md)
 - [September 2026](September2026.md)
diff --git a/iiif-online-workshop/September2026.md b/iiif-online-workshop/September2026.md
index fbcde54b..f077e6a2 100644
--- a/iiif-online-workshop/September2026.md
+++ b/iiif-online-workshop/September2026.md
@@ -1,12 +1,6 @@
-<script src="https://cdnjs.cloudflare.com/ajax/libs/jstimezonedetect/1.0.7/jstz.min.js" integrity="sha512-pZ0i46J1zsMwPd2NQZ4IaL427jXE2RVHMk3uv/wPTNlBVp9AbB1L65/4YdrXRPLEmyZCkY9qYOOsQp44V4orHg==" crossorigin="anonymous"></script>
-<script src="https://cdnjs.cloudflare.com/ajax/libs/dayjs/1.9.3/dayjs.min.js" integrity="sha512-u7elBfdMr+7LhU4rvUk3IM28QZDKTyUxba4Nx2IJ1W9cj4shfRSPq7EZXD2ULD9cBoizw2FQyeR6YBog6LcnHg==" crossorigin="anonymous"></script>
-<script src="https://cdnjs.cloudflare.com/ajax/libs/dayjs/1.9.3/plugin/utc.min.js" integrity="sha512-+lztPB4upMyG9pLdOWl8MFsBhXM1V9vFTDhXV3/4VSdoqpR5RfA2bNdrl8n0F9HmbzFkNqmOBdZw580qfRU01Q==" crossorigin="anonymous"></script>
-<script src="https://cdnjs.cloudflare.com/ajax/libs/dayjs/1.9.3/plugin/timezone.min.js" integrity="sha512-3QnyXIdU85C6rOXhHzVsXinI5/qM/LniMr5actNRUwyp1Tuurw7rOn7fX7WWoNyZuM7KlQxITGQI4ITCgXKGQA==" crossorigin="anonymous"></script>
-<script src="https://cdnjs.cloudflare.com/ajax/libs/dayjs/1.9.3/plugin/advancedFormat.min.js" integrity="sha512-bvTLx3e7Wk8qIAqr7O/vbk8IT2h+tFr1udHdJGzX6xMGtruTSCBctN0IGGjozmwap+l1A3zIz5KZUXI9IiBS3Q==" crossorigin="anonymous"></script>
-<script src="https://cdnjs.cloudflare.com/ajax/libs/dayjs/1.9.3/plugin/localizedFormat.min.js" integrity="sha512-85aup/PuxBbkUL6yEpshXfwrOWNt7rvFzFrfvYgnrBBQK2r1FEyqD+5qGVNPWSm8xxafm3mhBOvd975HBSaXNA==" crossorigin="anonymous"></script>
 <script type="text/javascript" src="js/setupIntro.js"></script>
 
- <div id="workshop-config" data-start="2026-09-28 17:00"></div>
+<div id="workshop-config" data-start="2026-09-28 17:00"></div>
 
 # Introduction
 
@@ -68,15 +62,6 @@ Tasks to be completed __before__ the meeting:
 There is also a course Google calendar available which you can subscribe to:
 <div id="calendar-container"></div>
 
-<script type="text/javascript">
-  var timezone = jstz.determine();
-  console.log('Name is ' + timezone.name());
-  var pref = '<iframe src="https://calendar.google.com/calendar/embed?src=clir.org_chugpdurgjm9njridh8uq676n0%40group.calendar.google.com&mode=WEEK&title=IIIF%20Online%20Workshop&dates=20260928/20261002&showTabs=0&ctz=';
-  var suff = '" style="border: 0" width="100%" height="300" frameborder="0" scrolling="no"></iframe>';
-  var iframe_html = pref + timezone.name() + suff;
-  document.getElementById('calendar-container').innerHTML = iframe_html;
-</script>
-
 You can also download a <a href="ics/September2026.ics">ICS version</a>.
 
 ## Project Work 
@@ -98,50 +83,3 @@ I look forward to working with you and if you have any questions please don’t
 IIIF Technical Coordinator<br/>
 International Image Interoperability Framework (IIIF) Consortium<br/>
 http://iiif.io<br/>
-
-<script type="text/javascript">
-    console.log('Working out times ');
-    dayjs.extend(dayjs_plugin_utc)
-    dayjs.extend(dayjs_plugin_timezone)
-    dayjs.extend(dayjs_plugin_advancedFormat)
-    var timezone = jstz.determine();
-    function setTime(time, section) {
-        console.log("Setting time in " + section);
-        var local = time.tz(timezone.name());
-
-        var span = document.getElementById(section);
-        span.innerHTML = local.format("h:mma z")
-    }
-    function setDay(time, section) {
-        console.log("Setting time in " + section);
-        var local = time.tz(timezone.name());
-
-        var span = document.getElementById(section);
-        span.innerHTML = local.format("dddd, MMMM D")
-        if (local.format("D").endsWith("0")) {
-            span.innerHTML += "th";
-        } else if (local.format("D").endsWith("1") && !(local.format("D").endsWith("11"))) {
-            span.innerHTML += "st";
-        } else if (local.format("D").endsWith("2") && !(local.format("D").endsWith("12"))) {
-            span.innerHTML += "nd";
-        } else if (local.format("D").endsWith("3") && !(local.format("D").endsWith("13"))) {
-            span.innerHTML += "rd";
-        } else {    
-            span.innerHTML += "th";
-        }
-    }
-    function setDates(time, day, timeId) {
-        setDay(time,day);
-        setTime(time,timeId);
-
-    }
-
-
-    setDates(dayjs.tz("2026-09-28 17:00", "Europe/London"),"day1", "intro");
-    setDates(dayjs.tz("2026-09-29 17:00", "Europe/London"),"day2", "image");
-    setDates(dayjs.tz("2026-09-30 17:00", "Europe/London"),"day3", "presentation");
-    setDates(dayjs.tz("2026-10-01 17:00", "Europe/London"),"day4", "annotations");
-    setDates(dayjs.tz("2026-10-02 17:00", "Europe/London"),"day5", "demos");
-    
-</script>
-
diff --git a/iiif-online-workshop/March2025.md b/iiif-online-workshop/editions/2025/March2025.md
similarity index 100%
rename from iiif-online-workshop/March2025.md
rename to iiif-online-workshop/editions/2025/March2025.md
diff --git a/iiif-online-workshop/May2025.md b/iiif-online-workshop/editions/2025/May2025.md
similarity index 100%
rename from iiif-online-workshop/May2025.md
rename to iiif-online-workshop/editions/2025/May2025.md
diff --git a/iiif-online-workshop/November2025.md b/iiif-online-workshop/editions/2025/November2025.md
similarity index 100%
rename from iiif-online-workshop/November2025.md
rename to iiif-online-workshop/editions/2025/November2025.md
diff --git a/iiif-online-workshop/editions/2025/README.md b/iiif-online-workshop/editions/2025/README.md
new file mode 100644
index 00000000..ba40f784
--- /dev/null
+++ b/iiif-online-workshop/editions/2025/README.md
@@ -0,0 +1,6 @@
+# 2025 Editions
+
+- [March 2025](March2025.md)
+- [May 2025](May2025.md)
+- [September 2025](September2025.md)
+- [November 2025](November2025.md)
\ No newline at end of file
diff --git a/iiif-online-workshop/September2025.md b/iiif-online-workshop/editions/2025/September2025.md
similarity index 100%
rename from iiif-online-workshop/September2025.md
rename to iiif-online-workshop/editions/2025/September2025.md
diff --git a/iiif-online-workshop/js/setupIntro.js b/iiif-online-workshop/js/setupIntro.js
index 4026ae15..cf92902c 100644
--- a/iiif-online-workshop/js/setupIntro.js
+++ b/iiif-online-workshop/js/setupIntro.js
@@ -1,8 +1,3 @@
-
-dayjs.extend(dayjs_plugin_utc)
-dayjs.extend(dayjs_plugin_timezone)
-dayjs.extend(dayjs_plugin_advancedFormat)
-
 function setTime(time, section) {
     console.log("Setting time in " + section);
     var timezone = jstz.determine();
@@ -72,7 +67,37 @@ function setupDates(start){
     setupCalendar(start);
 }
 
-document.addEventListener("DOMContentLoaded", function() {
-    var start = document.getElementById("workshop-config").dataset.start;
-    setupDates(dayjs.tz(start, "Europe/London"));
+function loadScript(src, integrity) {
+    return new Promise(function(resolve, reject) {
+        var s = document.createElement("script");
+        s.src = src;
+        if (integrity) s.integrity = integrity;
+        s.crossOrigin = "anonymous";
+        s.onload = resolve;
+        s.onerror = reject;
+        document.head.appendChild(s);
+    });
+}
+
+Promise.all([
+    loadScript("https://cdnjs.cloudflare.com/ajax/libs/jstimezonedetect/1.0.7/jstz.min.js", "sha512-pZ0i46J1zsMwPd2NQZ4IaL427jXE2RVHMk3uv/wPTNlBVp9AbB1L65/4YdrXRPLEmyZCkY9qYOOsQp44V4orHg=="),
+    loadScript("https://cdnjs.cloudflare.com/ajax/libs/dayjs/1.9.3/dayjs.min.js", "sha512-u7elBfdMr+7LhU4rvUk3IM28QZDKTyUxba4Nx2IJ1W9cj4shfRSPq7EZXD2ULD9cBoizw2FQyeR6YBog6LcnHg=="),
+]).then(function() {
+    return Promise.all([
+        loadScript("https://cdnjs.cloudflare.com/ajax/libs/dayjs/1.9.3/plugin/utc.min.js"),
+        loadScript("https://cdnjs.cloudflare.com/ajax/libs/dayjs/1.9.3/plugin/timezone.min.js"),
+        loadScript("https://cdnjs.cloudflare.com/ajax/libs/dayjs/1.9.3/plugin/advancedFormat.min.js"),
+        loadScript("https://cdnjs.cloudflare.com/ajax/libs/dayjs/1.9.3/plugin/localizedFormat.min.js"),
+    ]);
+}).then(function() {
+    dayjs.extend(dayjs_plugin_utc);
+    dayjs.extend(dayjs_plugin_timezone);
+    dayjs.extend(dayjs_plugin_advancedFormat);
+    dayjs.extend(dayjs_plugin_localizedFormat);
+
+    var el = document.getElementById("workshop-config");
+    if (el) {
+        var start = dayjs.tz(el.dataset.start, "Europe/London");
+        setupDates(start);
+    }
 });
\ No newline at end of file