diff --git a/include/text.php b/include/text.php
index 9fae74252b..fe2b973e58 100644
--- a/include/text.php
+++ b/include/text.php
@@ -14,6 +14,7 @@ use Friendica\Core\L10n;
 use Friendica\Core\PConfig;
 use Friendica\Core\System;
 use Friendica\Database\DBM;
+use Friendica\Model\Event;
 use Friendica\Model\Item;
 use Friendica\Model\Profile;
 use Friendica\Render\FriendicaSmarty;
@@ -1235,7 +1236,7 @@ function prepare_body(&$item, $attach = false, $preview = false) {
 	// In order to provide theme developers more possibilities, event items
 	// are treated differently.
 	if ($item['object-type'] === ACTIVITY_OBJ_EVENT && isset($item['event-id'])) {
-		$ev = format_event_item($item);
+		$ev = Event::getItemHTML($item);
 		return $ev;
 	}
 
diff --git a/mod/cal.php b/mod/cal.php
index ae4928bdf2..fdcb06a6f5 100644
--- a/mod/cal.php
+++ b/mod/cal.php
@@ -9,11 +9,13 @@
 use Friendica\App;
 use Friendica\Content\Feature;
 use Friendica\Content\Nav;
+use Friendica\Content\Widget;
 use Friendica\Core\Config;
 use Friendica\Core\L10n;
 use Friendica\Core\System;
 use Friendica\Database\DBM;
 use Friendica\Model\Contact;
+use Friendica\Model\Event;
 use Friendica\Model\Group;
 use Friendica\Model\Profile;
 use Friendica\Protocol\DFRN;
@@ -64,7 +66,7 @@ function cal_init(App $a)
 			'$pdesc' => (($profile['pdesc'] != "") ? $profile['pdesc'] : ""),
 		]);
 
-		$cal_widget = widget_events();
+		$cal_widget = Widget\CalendarExport::getHTML();
 
 		if (!x($a->page, 'aside')) {
 			$a->page['aside'] = '';
@@ -82,7 +84,7 @@ function cal_content(App $a)
 	Nav::setSelected('events');
 
 	// get the translation strings for the callendar
-	$i18n = get_event_strings();
+	$i18n = Event::getStrings();
 
 	$htpl = get_markup_template('event_head.tpl');
 	$a->page['htmlhead'] .= replace_macros($htpl, [
@@ -212,25 +214,25 @@ function cal_content(App $a)
 
 		// put the event parametes in an array so we can better transmit them
 		$event_params = [
-			'event_id' => (x($_GET, 'id') ? $_GET["id"] : 0),
-			'start' => $start,
-			'finish' => $finish,
-			'adjust_start' => $adjust_start,
+			'event_id'      => intval(defaults($_GET, 'id', 0)),
+			'start'         => $start,
+			'finish'        => $finish,
+			'adjust_start'  => $adjust_start,
 			'adjust_finish' => $adjust_finish,
-			'ignored' => $ignored,
+			'ignore'        => $ignored,
 		];
 
 		// get events by id or by date
-		if (x($_GET, 'id')) {
-			$r = event_by_id($owner_uid, $event_params, $sql_extra);
+		if ($event_params['event_id']) {
+			$r = Event::getListById($owner_uid, $event_params['event-id'], $sql_extra);
 		} else {
-			$r = events_by_date($owner_uid, $event_params, $sql_extra);
+			$r = Event::getListByDate($owner_uid, $event_params, $sql_extra);
 		}
 
 		$links = [];
 
 		if (DBM::is_result($r)) {
-			$r = sort_by_date($r);
+			$r = Event::sortByDate($r);
 			foreach ($r as $rr) {
 				$j = $rr['adjust'] ? DateTimeFormat::local($rr['start'], 'j') : DateTimeFormat::utc($rr['start'], 'j');
 				if (!x($links, $j)) {
@@ -240,7 +242,7 @@ function cal_content(App $a)
 		}
 
 		// transform the event in a usable array
-		$events = process_events($r);
+		$events = Event::prepareListForTemplate($r);
 
 		if ($a->argv[2] === 'json') {
 			echo json_encode($events);
@@ -306,7 +308,7 @@ function cal_content(App $a)
 		}
 
 		// Get the export data by uid
-		$evexport = event_export($owner_uid, $format);
+		$evexport = Event::exportListByUserId($owner_uid, $format);
 
 		if (!$evexport["success"]) {
 			if ($evexport["content"]) {
diff --git a/mod/events.php b/mod/events.php
index 8dab59b038..54f4e79528 100644
--- a/mod/events.php
+++ b/mod/events.php
@@ -6,11 +6,13 @@
 
 use Friendica\App;
 use Friendica\Content\Nav;
+use Friendica\Content\Widget\CalendarExport;
 use Friendica\Core\ACL;
 use Friendica\Core\L10n;
 use Friendica\Core\System;
 use Friendica\Core\Worker;
 use Friendica\Database\DBM;
+use Friendica\Model\Event;
 use Friendica\Model\Item;
 use Friendica\Model\Profile;
 use Friendica\Util\DateTimeFormat;
@@ -31,7 +33,7 @@ function events_init(App $a) {
 			return;
 		}
 
-		$cal_widget = widget_events();
+		$cal_widget = CalendarExport::getHTML();
 
 		if (! x($a->page,'aside')) {
 			$a->page['aside'] = '';
@@ -155,7 +157,6 @@ function events_post(App $a) {
 
 
 	$datarray = [];
-	$datarray['guid']      = get_guid(32);
 	$datarray['start']     = $start;
 	$datarray['finish']    = $finish;
 	$datarray['summary']   = $summary;
@@ -172,16 +173,14 @@ function events_post(App $a) {
 	$datarray['deny_gid']  = $str_group_deny;
 	$datarray['private']   = (($private_event) ? 1 : 0);
 	$datarray['id']        = $event_id;
-	$datarray['created']   = $created;
-	$datarray['edited']    = $edited;
 
 	if (intval($_REQUEST['preview'])) {
-		$html = format_event_html($datarray);
+		$html = Event::getHTML($datarray);
 		echo $html;
 		killme();
 	}
 
-	$item_id = event_store($datarray);
+	$item_id = Event::store($datarray);
 
 	if (! $cid) {
 		Worker::add(PRIORITY_HIGH, "Notifier", "event", $item_id);
@@ -222,7 +221,7 @@ function events_content(App $a) {
 	}
 
 	// get the translation strings for the callendar
-	$i18n = get_event_strings();
+	$i18n = Event::getStrings();
 
 	$htpl = get_markup_template('event_head.tpl');
 	$a->page['htmlhead'] .= replace_macros($htpl, [
@@ -331,25 +330,25 @@ function events_content(App $a) {
 
 		// put the event parametes in an array so we can better transmit them
 		$event_params = [
-			'event_id'      => (x($_GET, 'id') ? $_GET['id'] : 0),
+			'event_id'      => intval(defaults($_GET, 'id', 0)),
 			'start'         => $start,
 			'finish'        => $finish,
 			'adjust_start'  => $adjust_start,
 			'adjust_finish' => $adjust_finish,
-			'ignored'       => $ignored,
+			'ignore'        => $ignored,
 		];
 
 		// get events by id or by date
-		if (x($_GET, 'id')) {
-			$r = event_by_id(local_user(), $event_params);
+		if ($event_params['event_id']) {
+			$r = Event::getListById(local_user(), $event_params['event-id']);
 		} else {
-			$r = events_by_date(local_user(), $event_params);
+			$r = Event::getListByDate(local_user(), $event_params);
 		}
 
 		$links = [];
 
 		if (DBM::is_result($r)) {
-			$r = sort_by_date($r);
+			$r = Event::sortByDate($r);
 			foreach ($r as $rr) {
 				$j = $rr['adjust'] ? DateTimeFormat::local($rr['start'], 'j') : DateTimeFormat::utc($rr['start'], 'j');
 				if (! x($links,$j)) {
@@ -362,8 +361,8 @@ function events_content(App $a) {
 
 		// transform the event in a usable array
 		if (DBM::is_result($r)) {
-			$r = sort_by_date($r);
-			$events = process_events($r);
+			$r = Event::sortByDate($r);
+			$events = Event::prepareListForTemplate($r);
 		}
 
 		if ($a->argc > 1 && $a->argv[1] === 'json'){
@@ -543,8 +542,7 @@ function events_content(App $a) {
 	if ($mode === 'drop' && $event_id) {
 		$del = 0;
 
-		$params = ['event_id' => ($event_id)];
-		$ev = event_by_id(local_user(), $params);
+		$ev = Event::getListById(local_user(), $event_id);
 
 		// Delete only real events (no birthdays)
 		if (DBM::is_result($ev) && $ev[0]['type'] == 'event') {
diff --git a/src/Content/Text/BBCode.php b/src/Content/Text/BBCode.php
index 82c6f46980..b7e4207199 100644
--- a/src/Content/Text/BBCode.php
+++ b/src/Content/Text/BBCode.php
@@ -20,6 +20,7 @@ use Friendica\Core\PConfig;
 use Friendica\Core\Protocol;
 use Friendica\Core\System;
 use Friendica\Model\Contact;
+use Friendica\Model\Event;
 use Friendica\Network\Probe;
 use Friendica\Object\Image;
 use Friendica\Util\Map;
@@ -1373,7 +1374,7 @@ class BBCode extends BaseObject
 		// After we're finished processing the bbcode we'll
 		// replace all of the event code with a reformatted version.
 
-		$ev = bbtoevent($text);
+		$ev = Event::fromBBCode($text);
 
 		// Replace any html brackets with HTML Entities to prevent executing HTML or script
 		// Don't use strip_tags here because it breaks [url] search by replacing & with amp
@@ -1811,7 +1812,7 @@ class BBCode extends BaseObject
 		// start which is always required). Allow desc with a missing summary for compatibility.
 
 		if ((x($ev, 'desc') || x($ev, 'summary')) && x($ev, 'start')) {
-			$sub = format_event_html($ev, $simple_html);
+			$sub = Event::getHTML($ev, $simple_html);
 
 			$text = preg_replace("/\[event\-summary\](.*?)\[\/event\-summary\]/ism", '', $text);
 			$text = preg_replace("/\[event\-description\](.*?)\[\/event\-description\]/ism", '', $text);
diff --git a/src/Model/Event.php b/src/Model/Event.php
index 9c35e34e45..a1790edab2 100644
--- a/src/Model/Event.php
+++ b/src/Model/Event.php
@@ -105,7 +105,7 @@ class Event extends BaseObject
 	 * @param array $event Array which contains the event data.
 	 * @return string The event as a bbcode formatted string.
 	 */
-	public static function getBBCode(array $event)
+	private static function getBBCode(array $event)
 	{
 		$o = '';
 
@@ -289,10 +289,10 @@ class Event extends BaseObject
 			$item = dba::selectFirst('item', ['id'], ['event-id' => $event['id'], 'uid' => $event['uid']]);
 			if (DBM::is_result($item)) {
 				$object = '<object><type>' . xmlify(ACTIVITY_OBJ_EVENT) . '</type><title></title><id>' . xmlify($event['uri']) . '</id>';
-				$object .= '<content>' . xmlify(format_event_bbcode($event)) . '</content>';
+				$object .= '<content>' . xmlify(self::getBBCode($event)) . '</content>';
 				$object .= '</object>' . "\n";
 
-				$fields = ['body' => format_event_bbcode($event), 'object' => $object, 'edited' => $event['edited']];
+				$fields = ['body' => self::getBBCode($event), 'object' => $object, 'edited' => $event['edited']];
 				Item::update($fields, ['id' => $item['id']]);
 
 				$item_id = $item['id'];
@@ -335,11 +335,11 @@ class Event extends BaseObject
 			$item_arr['verb']          = ACTIVITY_POST;
 			$item_arr['object-type']   = ACTIVITY_OBJ_EVENT;
 			$item_arr['origin']        = $event['cid'] === 0 ? 1 : 0;
-			$item_arr['body']          = format_event_bbcode($event);
+			$item_arr['body']          = self::getBBCode($event);
 			$item_arr['event-id']      = $event['id'];
 
 			$item_arr['object']  = '<object><type>' . xmlify(ACTIVITY_OBJ_EVENT) . '</type><title></title><id>' . xmlify($event['uri']) . '</id>';
-			$item_arr['object'] .= '<content>' . xmlify(format_event_bbcode($event)) . '</content>';
+			$item_arr['object'] .= '<content>' . xmlify(self::getBBCode($event)) . '</content>';
 			$item_arr['object'] .= '</object>' . "\n";
 
 			$item_id = Item::insert($item_arr);
@@ -429,7 +429,7 @@ class Event extends BaseObject
 	 *
 	 * @todo We should replace this with a separate update function if there is some time left.
 	 */
-	public static function removeDuplicates(array $dates)
+	private static function removeDuplicates(array $dates)
 	{
 		$dates2 = [];
 
@@ -470,7 +470,7 @@ class Event extends BaseObject
 		);
 
 		if (DBM::is_result($r)) {
-			$return = event_remove_duplicates($r);
+			$return = self::removeDuplicates($r);
 		}
 
 		return $return;
@@ -519,7 +519,7 @@ class Event extends BaseObject
 		);
 
 		if (DBM::is_result($r)) {
-			$return = event_remove_duplicates($r);
+			$return = self::removeDuplicates($r);
 		}
 
 		return $return;
@@ -570,7 +570,7 @@ class Event extends BaseObject
 				$title = strip_tags(html_entity_decode($title, ENT_QUOTES, 'UTF-8'));
 			}
 
-			$html = format_event_html($event);
+			$html = self::getHTML($event);
 			$event['desc']     = BBCode::convert($event['desc']);
 			$event['location'] = BBCode::convert($event['location']);
 			$event_list[] = [
@@ -605,7 +605,7 @@ class Event extends BaseObject
 	 *
 	 * @todo Implement timezone support
 	 */
-	public static function formatListForExport(array $events, $format, $timezone)
+	private static function formatListForExport(array $events, $format, $timezone)
 	{
 		if (!count($events)) {
 			return '';
@@ -712,7 +712,7 @@ class Event extends BaseObject
 	 *
 	 * @return array Query results.
 	 */
-	public static function getListByUserId($uid = 0)
+	private static function getListByUserId($uid = 0)
 	{
 		$return = [];
 
@@ -761,11 +761,11 @@ class Event extends BaseObject
 		}
 
 		// Get all events which are owned by a uid (respects permissions).
-		$events = events_by_uid($uid);
+		$events = self::getListByUserId($uid);
 
 		// We have the events that are available for the requestor.
 		// Now format the output according to the requested format.
-		$res = event_format_export($events, $format, $timezone);
+		$res = self::formatListForExport($events, $format, $timezone);
 
 		// If there are results the precess was successfull.
 		if (!empty($res)) {
@@ -861,7 +861,7 @@ class Event extends BaseObject
 		}
 
 		// Format the event location.
-		$location = event_location2array($item['event-location']);
+		$location = self::locationToArray($item['event-location']);
 
 		// Construct the profile link (magic-auth).
 		$sp = false;
@@ -916,7 +916,7 @@ class Event extends BaseObject
 	 * 'address' => The address of the location,<br>
 	 * 'coordinates' => Latitude‎ and longitude‎ (e.g. '48.864716,2.349014').<br>
 	 */
-	public static function locationToArray($s = '') {
+	private static function locationToArray($s = '') {
 		if ($s == '') {
 			return [];
 		}
diff --git a/src/Model/Item.php b/src/Model/Item.php
index efcf05ad6a..64ca81a90b 100644
--- a/src/Model/Item.php
+++ b/src/Model/Item.php
@@ -98,7 +98,7 @@ class Item extends BaseObject
 	 * @param integer $item_id Item ID that should be delete
 	 * @param integer $priority Priority for the notification
 	 *
-	 * @return $boolean success
+	 * @return boolean success
 	 */
 	public static function deleteById($item_id, $priority = PRIORITY_HIGH)
 	{
@@ -153,7 +153,7 @@ class Item extends BaseObject
 
 		// If item is a link to an event, delete the event.
 		if (intval($item['event-id'])) {
-			event_delete($item['event-id']);
+			Event::delete($item['event-id']);
 		}
 
 		// If item has attachments, drop them
diff --git a/src/Protocol/DFRN.php b/src/Protocol/DFRN.php
index d1b5183a97..5fda6e6a75 100644
--- a/src/Protocol/DFRN.php
+++ b/src/Protocol/DFRN.php
@@ -19,11 +19,11 @@ use Friendica\Core\System;
 use Friendica\Core\Worker;
 use Friendica\Database\DBM;
 use Friendica\Model\Contact;
+use Friendica\Model\Event;
 use Friendica\Model\GContact;
 use Friendica\Model\Group;
 use Friendica\Model\Item;
 use Friendica\Model\Profile;
-use Friendica\Model\Term;
 use Friendica\Model\User;
 use Friendica\Object\Image;
 use Friendica\Protocol\OStatus;
@@ -2614,7 +2614,7 @@ class DFRN
 			// Is it an event?
 			if ($item["object-type"] == ACTIVITY_OBJ_EVENT) {
 				logger("Item ".$item["uri"]." seems to contain an event.", LOGGER_DEBUG);
-				$ev = bbtoevent($item["body"]);
+				$ev = Event::fromBBCode($item["body"]);
 				if ((x($ev, "desc") || x($ev, "summary")) && x($ev, "start")) {
 					logger("Event in item ".$item["uri"]." was found.", LOGGER_DEBUG);
 					$ev["cid"]     = $importer["id"];
@@ -2633,7 +2633,7 @@ class DFRN
 						$ev["id"] = $r[0]["id"];
 					}
 
-					$event_id = event_store($ev);
+					$event_id = Event::store($ev);
 					logger("Event ".$event_id." was stored", LOGGER_DEBUG);
 					return;
 				}