diff --git a/.eslintrc.json b/.eslintrc.json
index 7e4c829a2a..c20f92f8c1 100644
--- a/.eslintrc.json
+++ b/.eslintrc.json
@@ -153,6 +153,7 @@
         "invite": false,
         "colorspace": false,
         "reactions": false,
+        "reminder": false,
         "tutorial": false,
         "templates": false,
         "alert_words": false,
diff --git a/frontend_tests/node_tests/compose.js b/frontend_tests/node_tests/compose.js
index 1b18c4d123..0db4594673 100644
--- a/frontend_tests/node_tests/compose.js
+++ b/frontend_tests/node_tests/compose.js
@@ -46,6 +46,9 @@ set_global('notifications', {
     clear_compose_notifications: noop,
 });
 set_global('subs', {});
+set_global('reminder', {
+    is_deferred_delivery: noop,
+});
 
 // Setting these up so that we can test that links to uploads within messages are
 // automatically converted to server relative links.
diff --git a/static/js/compose.js b/static/js/compose.js
index 62c5dc2ac8..bff629690f 100644
--- a/static/js/compose.js
+++ b/static/js/compose.js
@@ -162,7 +162,7 @@ function create_message_object() {
     }
     return message;
 }
-// Export for testing
+
 exports.create_message_object = create_message_object;
 
 function compose_error(error_text, bad_input) {
@@ -177,6 +177,8 @@ function compose_error(error_text, bad_input) {
     }
 }
 
+exports.compose_error = compose_error;
+
 function nonexistent_stream_reply_error() {
     $("#nonexistent_stream_reply_error").show();
     $("#compose-reply-error-msg").html("There are no messages to reply to yet.");
@@ -210,6 +212,8 @@ function clear_compose_box() {
     resize.resize_bottom_whitespace();
 }
 
+exports.clear_compose_box = clear_compose_box;
+
 exports.send_message_success = function (local_id, message_id, locally_echoed) {
     if (!locally_echoed) {
         clear_compose_box();
@@ -279,102 +283,6 @@ exports.send_message = function send_message(request) {
     }
 };
 
-exports.deferred_message_types = {
-    scheduled: {
-        delivery_type: 'send_later',
-        test: /^\/schedule/,
-        slash_command: '/schedule',
-    },
-    reminders: {
-        delivery_type: 'remind',
-        test: /^\/remind/,
-        slash_command: '/remind',
-    },
-};
-
-function is_deferred_delivery(message_content) {
-    var reminders_test = exports.deferred_message_types.reminders.test;
-    var scheduled_test = exports.deferred_message_types.scheduled.test;
-    return (reminders_test.test(message_content) ||
-            scheduled_test.test(message_content));
-}
-
-function patch_request_for_scheduling(request) {
-    var new_request = request;
-    var raw_message = request.content.split('\n');
-    var command_line = raw_message[0];
-    var message = raw_message.slice(1).join('\n');
-
-    var deferred_message_type = _.filter(exports.deferred_message_types, function (props) {
-        return command_line.match(props.test) !== null;
-    })[0];
-    var command = command_line.match(deferred_message_type.test)[0];
-
-    var deliver_at = command_line.slice(command.length + 1);
-
-    if (message.trim() === '' || deliver_at.trim() === '' ||
-        command_line.slice(command.length, command.length + 1) !== ' ') {
-
-        $("#compose-textarea").attr('disabled', false);
-        if (command_line.slice(command.length, command.length + 1) !== ' ') {
-            compose_error(i18n.t('Invalid slash command. Check if you are missing a space after the command.'), $('#compose-textarea'));
-        } else if (deliver_at.trim() === '') {
-            compose_error(i18n.t('Please specify time for your reminder.'), $('#compose-textarea'));
-        } else {
-            compose_error(i18n.t('Your reminder note is empty!'), $('#compose-textarea'));
-        }
-        return;
-    }
-
-    new_request.content = message;
-    new_request.deliver_at = deliver_at;
-    new_request.delivery_type = deferred_message_type.delivery_type;
-    new_request.tz_guess = moment.tz.guess();
-    return new_request;
-}
-
-exports.schedule_message = function schedule_message(request, success, error) {
-    if (request === undefined) {
-        request = create_message_object();
-    }
-
-    if (request.type === "private") {
-        request.to = JSON.stringify(request.to);
-    } else {
-        request.to = JSON.stringify([request.to]);
-    }
-
-    /* success and error callbacks are kind of a package deal here. When scheduling
-    a message either by means of slash command or from message feed, if we need to do
-    something special on success then we will also need to know if our request errored
-    and do something appropriate. Therefore we just check if success callback is not
-    defined and just assume request to be coming from compose box. This is correct
-    because we won't ever actually have success operate in different context than error. */
-    if (success === undefined) {
-        success = function (data) {
-            notifications.notify_above_composebox('Scheduled your Message to be delivered at: ' + data.deliver_at);
-            $("#compose-textarea").attr('disabled', false);
-            clear_compose_box();
-        };
-        error = function (response) {
-            $("#compose-textarea").attr('disabled', false);
-            compose_error(response, $('#compose-textarea'));
-        };
-        /* We are adding a disable on compose under this block since it actually
-        has its place with the branch of code which does stuff when slash command
-        is incoming from compose_box */
-        $("#compose-textarea").attr('disabled', true);
-    }
-
-    request = patch_request_for_scheduling(request);
-
-    if (request === undefined) {
-        return;
-    }
-
-    transmit.send_message(request, success, error);
-};
-
 exports.enter_with_preview_open = function () {
     exports.clear_preview_area();
     if (page_params.enter_sends) {
@@ -396,8 +304,8 @@ exports.finish = function () {
     }
 
     var message_content = compose_state.message_content();
-    if (is_deferred_delivery(message_content)) {
-        exports.schedule_message();
+    if (reminder.is_deferred_delivery(message_content)) {
+        reminder.schedule_message();
     } else {
         exports.send_message();
     }
@@ -620,7 +528,7 @@ function validate_private_message() {
 exports.validate = function () {
     $("#compose-send-button").attr('disabled', 'disabled').blur();
     var message_content = compose_state.message_content();
-    if (is_deferred_delivery(message_content)) {
+    if (reminder.is_deferred_delivery(message_content)) {
         show_sending_indicator('Scheduling...');
     } else {
         show_sending_indicator();
diff --git a/static/js/popovers.js b/static/js/popovers.js
index 5a560ea001..4be8c94e90 100644
--- a/static/js/popovers.js
+++ b/static/js/popovers.js
@@ -349,46 +349,6 @@ exports.toggle_actions_popover = function (element, id) {
     }
 };
 
-function do_set_reminder(msgid, timestamp) {
-    var message = current_msg_list.get(msgid);
-    var link_to_msg = narrow.by_conversation_and_time_uri(message, true);
-    var command = compose.deferred_message_types.reminders.slash_command;
-    var reminder_timestamp = timestamp;
-    var custom_msg = '[this message](' + link_to_msg + ') at ' + reminder_timestamp;
-    var reminder_msg_content = command + ' ' + reminder_timestamp + '\n' + custom_msg;
-    var reminder_message = {
-        type: "private",
-        content: reminder_msg_content,
-        sender_id: page_params.user_id,
-        stream: '',
-        subject: '',
-    };
-    var recipient = page_params.email;
-    var emails = util.extract_pm_recipients(recipient);
-    reminder_message.to = emails;
-    reminder_message.reply_to = recipient;
-    reminder_message.private_message_recipient = recipient;
-    reminder_message.to_user_ids = people.email_list_to_user_ids_string(emails);
-
-    var row = $("[zid='" + msgid + "']");
-
-    function success() {
-        row.find(".alert-msg")
-            .text(i18n.t("Reminder set!"))
-            .css("display", "block")
-            .delay(1000).fadeOut(300);
-    }
-
-    function error() {
-        row.find(".alert-msg")
-            .text(i18n.t("Setting reminder failed!"))
-            .css("display", "block")
-            .delay(1000).fadeOut(300);
-    }
-
-    compose.schedule_message(reminder_message, success, error);
-}
-
 exports.render_actions_remind_popover = function (element, id) {
     popovers.hide_all();
     $(element).closest('.message_row').toggleClass('has_popover has_actions_popover');
@@ -754,7 +714,7 @@ exports.register_click_handlers = function () {
 
     function reminder_click_handler(datestr, e) {
         var id = $(".remind.custom").data('message-id');
-        do_set_reminder(id, datestr);
+        reminder.do_set_reminder_for_message(id, datestr);
         popovers.hide_all();
         e.stopPropagation();
         e.preventDefault();
diff --git a/static/js/reminder.js b/static/js/reminder.js
new file mode 100644
index 0000000000..2bdffd525e
--- /dev/null
+++ b/static/js/reminder.js
@@ -0,0 +1,145 @@
+var reminder = (function () {
+
+var exports = {};
+
+var deferred_message_types = {
+    scheduled: {
+        delivery_type: 'send_later',
+        test: /^\/schedule/,
+        slash_command: '/schedule',
+    },
+    reminders: {
+        delivery_type: 'remind',
+        test: /^\/remind/,
+        slash_command: '/remind',
+    },
+};
+
+exports.deferred_message_types = deferred_message_types;
+
+exports.is_deferred_delivery = function (message_content) {
+    var reminders_test = deferred_message_types.reminders.test;
+    var scheduled_test = deferred_message_types.scheduled.test;
+    return (reminders_test.test(message_content) ||
+            scheduled_test.test(message_content));
+};
+
+function patch_request_for_scheduling(request) {
+    var new_request = request;
+    var raw_message = request.content.split('\n');
+    var command_line = raw_message[0];
+    var message = raw_message.slice(1).join('\n');
+
+    var deferred_message_type = _.filter(deferred_message_types, function (props) {
+        return command_line.match(props.test) !== null;
+    })[0];
+    var command = command_line.match(deferred_message_type.test)[0];
+
+    var deliver_at = command_line.slice(command.length + 1);
+
+    if (message.trim() === '' || deliver_at.trim() === '' ||
+        command_line.slice(command.length, command.length + 1) !== ' ') {
+
+        $("#compose-textarea").attr('disabled', false);
+        if (command_line.slice(command.length, command.length + 1) !== ' ') {
+            compose.compose_error(i18n.t('Invalid slash command. Check if you are missing a space after the command.'), $('#compose-textarea'));
+        } else if (deliver_at.trim() === '') {
+            compose.compose_error(i18n.t('Please specify time for your reminder.'), $('#compose-textarea'));
+        } else {
+            compose.compose_error(i18n.t('Your reminder note is empty!'), $('#compose-textarea'));
+        }
+        return;
+    }
+
+    new_request.content = message;
+    new_request.deliver_at = deliver_at;
+    new_request.delivery_type = deferred_message_type.delivery_type;
+    new_request.tz_guess = moment.tz.guess();
+    return new_request;
+}
+
+function do_schedule_message(request, success, error) {
+
+    if (request.type === "private") {
+        request.to = JSON.stringify(request.to);
+    } else {
+        request.to = JSON.stringify([request.to]);
+    }
+
+    request = patch_request_for_scheduling(request);
+
+    if (request === undefined) {
+        return;
+    }
+
+    transmit.send_message(request, success, error);
+}
+
+exports.schedule_message = function (request) {
+    if (request === undefined) {
+        request = compose.create_message_object();
+    }
+
+    var success = function (data) {
+        notifications.notify_above_composebox('Scheduled your Message to be delivered at: ' + data.deliver_at);
+        $("#compose-textarea").attr('disabled', false);
+        compose.clear_compose_box();
+    };
+    var error = function (response) {
+        $("#compose-textarea").attr('disabled', false);
+        compose.compose_error(response, $('#compose-textarea'));
+    };
+    /* We are adding a disable on compose under this block because we
+    want slash commands to be blocking in nature. */
+    $("#compose-textarea").attr('disabled', true);
+
+    do_schedule_message(request, success, error);
+};
+
+exports.do_set_reminder_for_message = function (msgid, timestamp) {
+    var message = current_msg_list.get(msgid);
+    var link_to_msg = narrow.by_conversation_and_time_uri(message, true);
+    var command = deferred_message_types.reminders.slash_command;
+    var reminder_timestamp = timestamp;
+    var custom_msg = '[this message](' + link_to_msg + ') at ' + reminder_timestamp;
+    var reminder_msg_content = command + ' ' + reminder_timestamp + '\n' + custom_msg;
+    var reminder_message = {
+        type: "private",
+        content: reminder_msg_content,
+        sender_id: page_params.user_id,
+        stream: '',
+        subject: '',
+    };
+    var recipient = page_params.email;
+    var emails = util.extract_pm_recipients(recipient);
+    reminder_message.to = emails;
+    reminder_message.reply_to = recipient;
+    reminder_message.private_message_recipient = recipient;
+    reminder_message.to_user_ids = people.email_list_to_user_ids_string(emails);
+
+    var row = $("[zid='" + msgid + "']");
+
+    function success() {
+        row.find(".alert-msg")
+            .text(i18n.t("Reminder set!"))
+            .css("display", "block")
+            .delay(1000).fadeOut(300);
+    }
+
+    function error() {
+        row.find(".alert-msg")
+            .text(i18n.t("Setting reminder failed!"))
+            .css("display", "block")
+            .delay(1000).fadeOut(300);
+    }
+
+    do_schedule_message(reminder_message, success, error);
+};
+
+return exports;
+
+}());
+
+if (typeof module !== 'undefined') {
+    module.exports = reminder;
+}
diff --git a/zproject/settings.py b/zproject/settings.py
index 8d40e34294..a9878c66af 100644
--- a/zproject/settings.py
+++ b/zproject/settings.py
@@ -1045,6 +1045,7 @@ JS_SPECS = {
             'js/upload_widget.js',
             'js/avatar.js',
             'js/realm_icon.js',
+            'js/reminder.js',
             'js/settings_account.js',
             'js/settings_display.js',
             'js/settings_notifications.js',