Feature: Calendars are now exportable shareable so Third Party Calendar services can read them, also added recoccurence to calendar, and all day along with sperating the time fields and click in a box to add calendar event is possible

admin/database_updates/2.5.9.php

@@ -0,0 +1,28 @@
+<?php
+
+/*
+ * ITFlow - Database update to version 2.5.9 (from 2.5.8)
+ * Included by admin/database_updates.php - do not access directly
+ */
+
+defined('FROM_DB_UPDATER') || die("Direct file access is not allowed");
+
+    // Events can now be marked all-day explicitly. Until now calendar_events had
+    // no all-day column at all - FullCalendar inferred it from a start value with
+    // no time component, which meant a genuine midnight appointment was
+    // indistinguishable from an all-day event.
+    mysqli_query($mysqli, "ALTER TABLE `calendar_events`
+        ADD COLUMN `event_all_day` tinyint(1) NOT NULL DEFAULT 0 AFTER `event_end`");
+
+    // Backfill using the same rule the calendar already rendered by, so existing
+    // events keep displaying exactly as they do today: a midnight start, and
+    // either no end or a midnight end.
+    mysqli_query($mysqli, "UPDATE `calendar_events`
+        SET `event_all_day` = 1
+        WHERE TIME(`event_start`) = '00:00:00'
+        AND (`event_end` IS NULL OR TIME(`event_end`) = '00:00:00')");
+
+    // Corrects the collation on installs that already applied 2.5.8 before the
+    // column was pinned to utf8mb4_bin. Harmless to re-run.
+    mysqli_query($mysqli, "ALTER TABLE `calendars`
+        MODIFY COLUMN `calendar_feed_key` varchar(64) COLLATE utf8mb4_bin DEFAULT NULL");