diff --git a/app/assets/stylesheets/application.css b/app/assets/stylesheets/application.css
index 027f1a1..695b7fd 100644
--- a/app/assets/stylesheets/application.css
+++ b/app/assets/stylesheets/application.css
@@ -288,3 +288,11 @@ span#password {
     font-weight: normal;
     margin-bottom: 5px;
 }
+
+summary {
+    font-size: 12px;
+}
+
+summary:hover {
+    cursor: pointer;
+}
diff --git a/app/controllers/instance_controller.rb b/app/controllers/instance_controller.rb
index abc1d21..737abba 100644
--- a/app/controllers/instance_controller.rb
+++ b/app/controllers/instance_controller.rb
@@ -80,6 +80,20 @@ class InstanceController < ApplicationController
     end
   end
 
+  def adjust_pop
+    instance_id, nm, pwd = pop_instance_params
+    parent_instance = Instance.find_by(public_id: instance_id)
+    if params[:mins] && params[:pwd] == parent_instance.password
+      ts = Time.now.utc
+      pop = Pop.find_by(instance_id: parent_instance.id, name: nm)
+      pop.created_at = Time.at(ts - params[:mins].to_i.minutes).utc
+      pop.save
+      @instance = Instance.includes(:pops, :fairies).find_by(public_id: instance_id)
+      @forecast = Weather.forecast(@instance.zone.to_sym)
+      render partial: "list", locals: { instance: @instance, forecast: @forecast }
+    end
+  end
+
   def reset
     instance_id, nm, pwd = pop_instance_params
     parent_instance = Instance.find_by(public_id: instance_id)
diff --git a/app/javascript/list.js b/app/javascript/list.js
index fc8d3a8..9b6bea8 100644
--- a/app/javascript/list.js
+++ b/app/javascript/list.js
@@ -19,6 +19,12 @@ function checkPwd() {
           btn.setAttribute("hx-post", `${oldUrl}&pwd=${pwd}`);
         });
 
+        const forms = document.querySelectorAll(".action-form");
+        forms.forEach(form => {
+           const oldUrl = form.getAttribute("action");
+           form.setAttribute("action", `${oldUrl}&pwd=${pwd}`);
+        });
+
         const pwd_el = document.getElementById("password");
         pwd_el.innerHTML = pwd;
     }
diff --git a/app/views/instance/_list.html.erb b/app/views/instance/_list.html.erb
index 03e2db9..cf45a33 100644
--- a/app/views/instance/_list.html.erb
+++ b/app/views/instance/_list.html.erb
@@ -36,6 +36,14 @@
           <span class="progress-container">
             <span class="progress-bar" style="width: <%= (mins.in_minutes / 120) * 100 %>%"></span>
           </span>
+          <details class="needs_pwd" hx-preserve id="change-form-<%= nm[:name].parameterize %>">
+            <summary>adjust pop time</summary>
+            <%= form_with url: adjust_pop_path(instance: instance.public_id, nm: nm[:name].parameterize), class: "action-form", html: {"hx-boost": true, "hx-replace-url": false, "hx-target": "#nm-list", "hx-select": "#nm-list", "hx-swap": "outerHTML:w
+"} do |f| %>
+              <%= f.number_field :mins, placeholder: "minutes ago" %>
+              <%= f.submit "change" %>
+            <% end %>
+          </details>
         <% else %>
           <% if nm[:weather] && forecast[0][:curr_weather] != nm[:weather] %>
             <% next_pattern = forecast.find { |f| f[:curr_weather] == nm[:weather] } %>
diff --git a/config/routes.rb b/config/routes.rb
index ec9c047..bc88fe6 100644
--- a/config/routes.rb
+++ b/config/routes.rb
@@ -5,6 +5,7 @@ Rails.application.routes.draw do
   post "/new", to: "instance#create", as: :new_instance
   post "/new_from_fe", to: "instance#create_from_fe", as: :new_from_fe
   post "/pop", to: "instance#pop", as: :pop_in_instance
+  post "/pop/adjust", to: "instance#adjust_pop", as: :adjust_pop
   post "/reset", to: "instance#reset", as: :reset_in_instance
   post "/auth", to: "instance#authenticate", as: :authenticate_to_instance
   post "/fairy/mark", to: "fairy#mark", as: :mark_fairy