Add human readable time of day option

src/RRule.php

@@ -2071,6 +2071,7 @@ class RRule implements RRuleInterface
 	 * | `explicit_inifite`| bool    | Mention "forever" if the rule is infinite (true)
 	 * | `dtstart`         | bool    | Mention the start date (true)
 	 * | `include_start`   | bool    |
+	 * | `start_time_only` | bool    | Mention the time of day only, without the date
 	 * | `include_until`   | bool    |
 	 * | `custom_path`     | string  |
 	 *
@@ -2091,6 +2092,7 @@ class RRule implements RRuleInterface
 			'fallback' => 'en',
 			'explicit_infinite' => true,
 			'include_start' => true,
+			'start_time_only' => false,
 			'include_until' => true,
 			'custom_path' => null
 		);
@@ -2106,7 +2108,7 @@ class RRule implements RRuleInterface
 		}
 
 		if ($opt['use_intl']) {
-			$default_opt['date_format'] = \IntlDateFormatter::SHORT;
+			$default_opt['date_format'] = isset($opt['start_time_only']) && $opt['start_time_only'] ? \IntlDateFormatter::NONE : \IntlDateFormatter::SHORT;
 			if ($this->freq >= self::SECONDLY || not_empty($this->rule['BYSECOND'])) {
 				$default_opt['time_format'] = \IntlDateFormatter::LONG;
 			}
@@ -2114,7 +2116,7 @@ class RRule implements RRuleInterface
 				$default_opt['time_format'] = \IntlDateFormatter::SHORT;
 			}
 			else {
-				$default_opt['time_format'] = \IntlDateFormatter::NONE;
+				$default_opt['time_format'] = isset($opt['start_time_only']) && $opt['start_time_only'] ? \IntlDateFormatter::SHORT : \IntlDateFormatter::NONE;
 			}
 		}
 
@@ -2149,8 +2151,9 @@ class RRule implements RRuleInterface
 				};
 			}
 			else {
-				$opt['date_formatter'] = function($date) {
-					return $date->format('Y-m-d H:i:s');
+				$opt['date_formatter'] = function ($date) use ($opt) {
+					$format = $opt['start_time_only'] ? 'H:i:s' : 'Y-m-d H:i:s';
+					return $date->format($format);
 				};
 			}
 		}
@@ -2362,7 +2365,12 @@ class RRule implements RRuleInterface
 
 		if ($opt['include_start']) {
 			// from X
-			$parts['start'] = strtr($i18n['dtstart'], array(
+			if ($opt['start_time_only']) {
+				$value = $this->freq >= self::HOURLY ? 'startingtimeofday' : 'timeofday';
+			} else {
+				$value = 'dtstart';
+			}
+			$parts['start'] = strtr($i18n[$value], array(
 				'%{date}' => $opt['date_formatter']($this->dtstart)
 			));
 		}

src/i18n/de.php

@@ -44,6 +44,8 @@ return array(
 		'else' => 'Alle %{interval} Sekunden'
 	),
 	'dtstart' => ', ab dem %{date}',
+	'timeofday' => ' um %{date}',
+	'startingtimeofday' => ' ab %{date}',
 	'infinite' => ', für immer',
 	'until' => ', bis zum %{date}',
 	'count' => array(

src/i18n/en.php

@@ -46,6 +46,8 @@ return array(
 		'else' => 'every %{interval} seconds'
 	),
 	'dtstart' => ', starting from %{date}',
+	'timeofday' => ' at %{date}',
+	'startingtimeofday' => ' starting at %{date}',
 	'infinite' => ', forever',
 	'until' => ', until %{date}',
 	'count' => array(

src/i18n/es.php

@@ -39,6 +39,8 @@ return array(
 		'else' => 'cada %{interval} segundos'// cada 8 segundos
 	),
 	'dtstart' => ', empezando desde %{date}',
+	'timeofday' => ' a las %{date}',
+	'startingtimeofday' => ' empezando desde %{date}',
 	'infinite' => ', por siempre',
 	'until' => ', hasta %{date}',
 	'count' => array(

src/i18n/fa.php

@@ -42,6 +42,8 @@ return array(
 		'else' => 'هر %{interval} ثانیه'
 	),
 	'dtstart' => ', از %{date}',
+	'timeofday' => ' از %{date}',
+	'startingtimeofday' => ' از %{date}',
 	'infinite' => ', همیشه',
 	'until' => ', تا %{date}',
 	'count' => array(

src/i18n/fi.php

@@ -46,6 +46,8 @@ return array(
 		'else' => 'joka %{interval} sekunti'
 	),
 	'dtstart' => ', alkaen %{date}',
+	'timeofday' => ' klo %{date}',
+	'startingtimeofday' => ' alkaen %{date}',
 	'infinite' => ', jatkuvasti',
 	'until' => ', %{date} asti',
 	'count' => array(

src/i18n/fr.php

@@ -44,6 +44,8 @@ return array(
 		'else' => 'toutes les %{interval} secondes'
 	),
 	'dtstart' => ', à partir du %{date}',
+	'timeofday' => ' à %{date}',
+	'startingtimeofday' => ' à partir du %{date}',
 	'infinite' => ', indéfiniment',
 	'until' => ', jusqu\'au %{date}',
 	'count' => array(

src/i18n/he.php

@@ -41,6 +41,8 @@ return array(
 		'else' => 'כל %{interval} שניות'
 	),
 	'dtstart' => ', החל מ%{date}',
+	'timeofday' => ' החל מ%{date}',
+	'startingtimeofday' => ' החל מ%{date}',
 	'infinite' => ', לעד',
 	'until' => ', עד %{date}',
 	'count' => array(

src/i18n/it.php

@@ -38,6 +38,8 @@ return array(
 		'else' => 'ogni %{interval} secondi'
 	),
 	'dtstart' => ', a partire dal %{date}',
+	'timeofday' => ' alle %{date}',
+	'startingtimeofday' => ' a partire dal %{date}',
 	'infinite' => ', per sempre',
 	'until' => ', fino al %{date}',
 	'count' => array(

src/i18n/nl.php

@@ -46,6 +46,8 @@ return array(
         'else' => 'elke %{interval} seconden'
     ),
     'dtstart' => ', wordt gestart vanaf %{date}',
+    'timeofday' => ' om %{date}',
+    'startingtimeofday' => ' wordt gestart vanaf %{date}',
     'infinite' => ', oneindig',
     'until' => ', tot en met %{date}',
     'count' => array(

src/i18n/pl.php

@@ -58,6 +58,8 @@ return array(
 		'else' => 'co %{interval} sekund'
 	),
 	'dtstart' => ', zaczynając od %{date}',
+	'timeofday' => ' o %{date}',
+	'startingtimeofday' => ' zaczynając od %{date}',
 	'infinite' => ', zawsze',
 	'until' => ', do daty %{date}',
 	'count' => array(

src/i18n/pt.php

@@ -39,6 +39,8 @@ return array(
 		'else' => 'cada %{interval} segundos'// cada 8 segundos
 	),
 	'dtstart' => ', começando de %{date}',
+	'timeofday' => ' às %{date}',
+	'startingtimeofday' => ' começando de %{date}',
 	'infinite' => ', para sempre',
 	'until' => ', até %{date}',
 	'count' => array(

src/i18n/sv.php

@@ -51,6 +51,8 @@ return array(
 		'else' => 'var %{interval}:e sekund'
 	),
 	'dtstart' => ', börjar %{date}',
+	'timeofday' => ' kl %{date}',
+	'startingtimeofday' => ' börjar %{date}',
 	'infinite' => ', tills vidare',
 	'until' => ', t.om %{date}',
 	'count' => array(

tests/RRuleTest.php

@@ -3204,6 +3204,18 @@ class RRuleTest extends TestCase
 				"daily",
 				"daily"
 			),
+			array(
+				"DTSTART:20170202T161500Z\nRRULE:FREQ=MONTHLY;BYMONTHDAY=2",
+				array('locale' => "en", 'start_time_only' => true, 'explicit_infinite' => false),
+				"monthly on the 2nd of the month at 4:15 PM",
+				"monthly on the 2nd of the month at 16:15:00"
+			),
+			array(
+				"DTSTART:20170202T063000Z\nRRULE:FREQ=HOURLY;INTERVAL=7",
+				array('locale' => "en", 'start_time_only' => true, 'explicit_infinite' => false),
+				"every 7 hours starting at 6:30 AM",
+				"every 7 hours starting at 06:30:00"
+			),
 			array(
 				"RRULE:FREQ=YEARLY;BYMONTH=3;BYDAY=+2TU",
 				array('locale' => "en", 'include_start' => false, 'explicit_infinite' => false),