diff --git a/src/doeditcalendar.php b/src/doeditcalendar.php
new file mode 100644
index 0000000..b58d207
--- /dev/null
+++ b/src/doeditcalendar.php
@@ -0,0 +1,30 @@
+<?php
+require_once("core.php");
+security::checkType(security::ADMIN);
+
+if (!security::checkParams("POST", [
+  ["id", security::PARAM_NEMPTY],
+  ["type", security::PARAM_ISSET]
+])) {
+  security::go("calendars.php?msg=unexpected");
+}
+
+$id = (int)$_POST["id"];
+
+$c = calendars::get($id);
+
+if ($c === false) {
+  security::go("calendars.php?msg=unexpected");
+}
+
+$calendar_response = calendars::parseFormCalendar($_POST["type"], $c["begins"], $c["ends"], true);
+
+if ($calendar_response === false) {
+  security::go("calendars.php?msg=unexpected");
+}
+
+if (calendars::edit($id, $calendar_response["calendar"])) {
+  security::go("calendars.php?msg=modified");
+} else {
+  security::go("calendars.php?msg=unexpected");
+}