diff --git a/djangorota/djangorota/templates/rota/partials/select_workers_modal.html b/djangorota/djangorota/templates/rota/partials/select_workers_modal.html
new file mode 100644
index 0000000..527307d
--- /dev/null
+++ b/djangorota/djangorota/templates/rota/partials/select_workers_modal.html
@@ -0,0 +1,93 @@
+<div class="modal-card">
+  <header class="modal-card-head">
+    <p class="modal-card-title">Apply leave to workers</p>
+    <button class="delete" aria-label="close" onclick="(function(){ if(window.closeProcRotaModal) window.closeProcRotaModal(); })()"></button>
+  </header>
+  <section class="modal-card-body">
+    <p class="help">Select one or more workers to apply the selected leave range to.</p>
+    <form id="apply-multi-form" method="post" action="{% url 'rota:apply_leave_multi' %}" hx-post="{% url 'rota:apply_leave_multi' %}" hx-swap="none">
+      {% csrf_token %}
+      <input type="hidden" name="start_date" value="{{ start_date }}" />
+      <input type="hidden" name="end_date" value="{{ end_date }}" />
+      <div style="max-height:300px; overflow:auto; margin-top:0.5rem;">
+        {% for w in workers %}
+          <div class="field">
+            <label class="checkbox"><input type="checkbox" name="worker_id" value="{{ w.id }}"> {{ w.name }}{% if w.site %} — {{ w.site }}{% endif %}</label>
+          </div>
+        {% empty %}
+          <p class="help">No workers available.</p>
+        {% endfor %}
+      </div>
+    </form>
+  </section>
+  <footer class="modal-card-foot">
+    <button id="apply-multi-submit" class="button is-success" type="submit" disabled>Apply leave</button>
+    <button class="button" type="button" onclick="(function(){ if(window.closeProcRotaModal) window.closeProcRotaModal(); })()">Cancel</button>
+  </footer>
+  <script>
+    (function(){
+      const form = document.getElementById('apply-multi-form');
+      const submitBtn = document.getElementById('apply-multi-submit');
+      if(!form) return;
+
+      function updateBtn(){
+        const any = Array.from(form.querySelectorAll('input[type=checkbox][name="worker_id"]')).some(cb=>cb.checked);
+        submitBtn.disabled = !any;
+      }
+
+      // Attach change handlers to checkboxes
+      Array.from(form.querySelectorAll('input[type=checkbox][name="worker_id"]')).forEach(cb=> cb.addEventListener('change', updateBtn));
+      updateBtn();
+
+      // Make the external Apply button trigger the form submit (button is outside the <form>)
+      submitBtn.addEventListener('click', function(ev){
+        ev.preventDefault();
+        if(typeof form.requestSubmit === 'function'){
+          form.requestSubmit();
+        } else {
+          // older browsers
+          const submitEvt = new Event('submit', {bubbles: true, cancelable: true});
+          form.dispatchEvent(submitEvt);
+        }
+      });
+
+      // Fallback submit handler using fetch so the modal doesn't navigate away
+      form.addEventListener('submit', function(ev){
+        ev.preventDefault();
+        // collect form data
+        const fd = new FormData(form);
+        const url = form.action;
+        // fetch with CSRF from cookie if present
+        function getCookie(name){
+          const v = document.cookie.match('(^|;)\\s*' + name + '\\s*=\\s*([^;]+)');
+          return v ? v.pop() : '';
+        }
+        fetch(url, {
+          method: 'POST',
+          credentials: 'same-origin',
+          headers: {
+            'X-CSRFToken': getCookie('csrftoken'),
+            'HX-Request': 'true'
+          },
+          body: fd
+        }).then(resp=>{
+          // Respect HX-Trigger header if present
+          const trig = resp.headers.get('HX-Trigger') || resp.headers.get('Hx-Trigger');
+          if(trig){
+            const parts = trig.split(',').map(s=>s.trim()).filter(Boolean);
+            if(parts.includes('closeModal')){
+              if(window.closeProcRotaModal) window.closeProcRotaModal();
+            }
+            if(parts.includes('leaveUpdated')){
+              // dispatch a custom event that other code listens to
+              try{ window.dispatchEvent(new Event('leaveUpdated')); }catch(e){}
+            }
+          }
+          if(!resp.ok){
+            resp.text().then(t=>{ alert('Failed to apply leave: ' + (t||resp.statusText)); });
+          }
+        }).catch(err=>{ console.error('apply-multi submit failed', err); alert('Failed to apply leave'); });
+      });
+    })();
+  </script>
+</div>
diff --git a/djangorota/rota/urls.py b/djangorota/rota/urls.py
index 0797bb8..4029fb5 100644
--- a/djangorota/rota/urls.py
+++ b/djangorota/rota/urls.py
@@ -22,6 +22,8 @@ urlpatterns = [
     path("worker/settings/token/<uuid:token>/", views.worker_settings_token, name="worker_settings_token"),
     path("leaves/all/", views.leaves_global, name="leaves_global"),
     path("leaves/all.json", views.leaves_global_json, name="leaves_global_json"),
+    path("leave/select_workers/", views.select_workers_modal, name="select_workers_modal"),
+    path("leave/apply_multi/", views.apply_leave_multi, name="apply_leave_multi"),
     path("leave/<int:leave_id>/delete/", views.leave_delete, name="leave_delete"),
     path("worker/<int:worker_id>/leaves/delete_all/", views.leave_delete_all, name="leave_delete_all"),
     path("worker/<int:worker_id>/regenerate_token/", views.regenerate_worker_token, name="regenerate_worker_token"),
diff --git a/djangorota/rota/views.py b/djangorota/rota/views.py
index defb184..1528e5a 100644
--- a/djangorota/rota/views.py
+++ b/djangorota/rota/views.py
@@ -1085,6 +1085,59 @@ def leaves_global(request):
 	return render(request, 'rota/leaves_global.html', {'leaves_json': leaves_json})
 
 
+@require_http_methods(["GET"])
+def select_workers_modal(request):
+	"""Return an HTMX modal partial that lists workers to apply a selected leave range to.
+
+	Query params: start_date, end_date, rota_id (optional)
+	"""
+	start_date = request.GET.get('start_date')
+	end_date = request.GET.get('end_date')
+	rota_id = request.GET.get('rota_id')
+	workers = Worker.objects.all()
+	if rota_id:
+		try:
+			workers = workers.filter(rotas__id=int(rota_id))
+		except Exception:
+			pass
+	workers = workers.order_by('name')
+	modal_html = render_to_string(
+		'rota/partials/select_workers_modal.html',
+		{'workers': workers, 'start_date': start_date, 'end_date': end_date},
+		request=request,
+	)
+	return HttpResponse(modal_html)
+
+
+@require_http_methods(["POST"])
+def apply_leave_multi(request):
+	"""Apply a leave range to multiple workers. Expects POST with worker_ids (list), start_date and end_date."""
+	from .models import Leave
+
+	worker_ids = request.POST.getlist('worker_id')
+	start_date = request.POST.get('start_date')
+	end_date = request.POST.get('end_date')
+	if not worker_ids or not start_date:
+		return HttpResponseBadRequest('Missing parameters')
+	created = []
+	for wid in worker_ids:
+		try:
+			w = Worker.objects.get(pk=int(wid))
+		except Exception:
+			continue
+		try:
+			leave = Leave(worker=w, start_date=start_date, end_date=end_date)
+			leave.save()
+			created.append(leave)
+		except Exception:
+			continue
+
+	# Return simple HTMX response: close modal and trigger calendar refresh
+	response = HttpResponse('')
+	response['HX-Trigger'] = 'closeModal,leaveUpdated'
+	return response
+
+
 @require_POST
 def leave_delete(request, leave_id):
 	"""Delete a Leave record. Allowed if the requester is staff, or if a valid token matches the worker, or the authenticated user's email matches the worker email."""
diff --git a/static/js/calendar.js b/static/js/calendar.js
index 45fc27f..4f66906 100644
--- a/static/js/calendar.js
+++ b/static/js/calendar.js
@@ -168,10 +168,22 @@
           previewEnd = null;
           render();
           if(selStart && selEnd){
-            const url = requestUrl + '?worker_id=' + encodeURIComponent(workerId) + '&start_date=' + selStart + '&end_date=' + selEnd;
-            setTimeout(function(){
-              try{ if(window.htmx && typeof window.htmx.ajax === 'function'){ window.htmx.ajax('GET', url, {target:'#modal', swap:'innerHTML'}); } else { htmx.ajax('GET', url, {target:'#modal', swap:'innerHTML'}); } }catch(e){ window.location = url; }
-            }, 80);
+            // If a specific workerId is supplied, use existing single-worker modal flow.
+            if(workerId){
+              const url = requestUrl + '?worker_id=' + encodeURIComponent(workerId) + '&start_date=' + selStart + '&end_date=' + selEnd;
+              setTimeout(function(){
+                try{ if(window.htmx && typeof window.htmx.ajax === 'function'){ window.htmx.ajax('GET', url, {target:'#modal', swap:'innerHTML'}); } else { htmx.ajax('GET', url, {target:'#modal', swap:'innerHTML'}); } }catch(e){ window.location = url; }
+              }, 80);
+            } else {
+              // Global calendar: prompt for workers to apply this leave to.
+              // Use an HTMX GET to render the select-workers modal.
+              let url = '/leave/select_workers/?start_date=' + encodeURIComponent(selStart) + '&end_date=' + encodeURIComponent(selEnd);
+              // Include rota_id if present in the page URL
+              try{ const rotaParam = new URLSearchParams(window.location.search).get('rota_id'); if(rotaParam){ url += '&rota_id=' + encodeURIComponent(rotaParam); } }catch(e){}
+              setTimeout(function(){
+                try{ if(window.htmx && typeof window.htmx.ajax === 'function'){ window.htmx.ajax('GET', url, {target:'#modal', swap:'innerHTML'}); } else { htmx.ajax('GET', url, {target:'#modal', swap:'innerHTML'}); } }catch(e){ window.location = url; }
+              }, 80);
+            }
           }
         }catch(e){ console.error('calendar pointer handler', e); }
       });