diff --git a/migrations/tasks/tasks-set-yesterdailies.js b/migrations/tasks/tasks-set-yesterdailies.js
new file mode 100644
index 0000000000..8ce87b1046
--- /dev/null
+++ b/migrations/tasks/tasks-set-yesterdailies.js
@@ -0,0 +1,83 @@
+var migrationName = 'tasks-set-yesterdaily';
+var authorName = 'TheHollidayInn'; // in case script author needs to know when their ...
+var authorUuid = ''; //... own data is done
+
+/*
+ * Iterates over all tasks and sets the yseterDaily field to True
+ */
+
+import monk from 'monk';
+
+var connectionString = 'mongodb://localhost:27017/habitrpg?auto_reconnect=true'; // FOR TEST DATABASE
+var dbTasks = monk(connectionString).get('tasks', { castIds: false });
+
+function processTasks(lastId) {
+  // specify a query to limit the affected tasks (empty for all tasks):
+  var query = {
+    yesterDaily: false,
+  };
+
+  if (lastId) {
+    query._id = {
+      $gt: lastId
+    }
+  }
+
+  dbTasks.find(query, {
+    sort: {_id: 1},
+    limit: 250,
+    fields: [ // specify fields we are interested in to limit retrieved data (empty if we're not reading data):
+    ],
+  })
+  .then(updateTasks)
+  .catch(function (err) {
+    console.log(err);
+    return exiting(1, 'ERROR! ' + err);
+  });
+}
+
+var progressCount = 1000;
+var count = 0;
+
+function updateTasks (tasks) {
+  if (!tasks || tasks.length === 0) {
+    console.warn('All appropriate tasks found and modified.');
+    displayData();
+    return;
+  }
+
+  var taskPromises = tasks.map(updatetask);
+  var lasttask = tasks[tasks.length - 1];
+
+  return Promise.all(taskPromises)
+  .then(function () {
+    processtasks(lasttask._id);
+  });
+}
+
+function updatetask (task) {
+  count++;
+  var set = {'yesterDaily': true};
+
+  dbTasks.update({_id: task._id}, {$set:set});
+
+  if (count % progressCount == 0) console.warn(count + ' ' + task._id);
+  if (task._id == authorUuid) console.warn(authorName + ' processed');
+}
+
+function displayData() {
+  console.warn('\n' + count + ' tasks processed\n');
+  return exiting(0);
+}
+
+function exiting(code, msg) {
+  code = code || 0; // 0 = success
+  if (code && !msg) { msg = 'ERROR!'; }
+  if (msg) {
+    if (code) { console.error(msg); }
+    else      { console.log(  msg); }
+  }
+  process.exit(code);
+}
+
+module.exports = processtasks;
diff --git a/website/server/models/task.js b/website/server/models/task.js
index 8c5c3aa87a..226a364408 100644
--- a/website/server/models/task.js
+++ b/website/server/models/task.js
@@ -245,6 +245,7 @@ export let DailySchema = new Schema(_.defaults({
   weeksOfMonth: {type: [Number], default: []}, // Weeks of the month that the daily should repeat on
   isDue: {type: Boolean},
   nextDue: [{type: String}],
+  yesterDaily: {type: Boolean, default: true, required: true},
 }, habitDailySchema(), dailyTodoSchema()), subDiscriminatorOptions);
 export let daily = Task.discriminator('daily', DailySchema);