diff --git a/src/NodaTimeAutotranslater.php b/src/NodaTimeAutotranslater.php
index 9c0245a..0095c59 100644
--- a/src/NodaTimeAutotranslater.php
+++ b/src/NodaTimeAutotranslater.php
@@ -21,6 +21,8 @@ final class NodaTimeAutotranslater {
     const TRANSLATABLE_SINCE_START = 3;
     const TRANSLATABLE_UNTIL_END = 4;
     const TRANSLATABLE_ONLY_YEAR = 5;
+    const TRANSLATABLE_CENTURY = 6;
+    const TRANSLATABLE_DECADE = 7;
 
     const LANGS_TO_LOCALES = [
         'ar' => 'ar_SY.utf8',
@@ -197,6 +199,52 @@ final class NodaTimeAutotranslater {
         'zh' => '直到%s',
     ];
 
+    const LANGS_CENTURY_FORMAT = [
+        'ar' => 'القرن ال %s',
+        'de' => '%s. Jahrhundert',
+        'en' => '%s. century',
+        'es' => 'Siglo %s',
+        'fa' => 'قرن %s',
+        'fr' => '%sème siècle',
+        'hu' => '%s. század',
+        'id' => 'abad ke-%s',
+        'it' => '%sesimo secolo',
+        'ka' => 'მე -%s საუკუნე',
+        'ko' => '%s 세기',
+        'pl' => '%s wiek',
+        'pt' => 'século %s',
+        'ro' => 'secolul al %s-lea',
+        'ru' => '%s век',
+        'ta' => '%s ஆம் நூற்றாண்டு',
+        'tl' => 'Ika-%s na siglo',
+        'tr' => '%s. yüzyıl',
+        'ja' => '%s世紀',
+        'zh' => '%s世紀',
+    ];
+
+    const LANGS_CENTURIES_FORMAT = [
+        'ar' => 'القرن ال %s-%s',
+        'de' => '%s.-%s. Jahrhundert',
+        'en' => '%s.-%s. century',
+        'es' => 'Siglo %s-%s',
+        'fa' => 'قرن %s-%s',
+        'fr' => '%s-%sème siècle',
+        'hu' => '%s.-%s. század',
+        'id' => 'abad ke-%s-%s',
+        'it' => '%s-%sesimo secolo',
+        'ka' => 'მე -%s-%s საუკუნე',
+        'ko' => '%s-%s 세기',
+        'pl' => '%s-%s wiek',
+        'pt' => 'século %s-%s',
+        'ro' => 'secolul al %s-%s-lea',
+        'ru' => '%s-%s век',
+        'ta' => '%s-%s ஆம் நூற்றாண்டு',
+        'tl' => 'Ika-%s hanggang ika-%s na siglo',
+        'tr' => '%s.-%s. yüzyıl',
+        'ja' => '%s世紀-%s世紀',
+        'zh' => '%s-%s世紀',
+    ];
+
     /** @var MDMysqli */
     private MDMysqli $_mysqli_noda;
     /** @var integer */
@@ -222,9 +270,15 @@ final class NodaTimeAutotranslater {
         if (intval($zeit_ende) > 1000 and $zeit_beginn === "?") {
             return self::TRANSLATABLE_UNTIL_END;
         }
+
         if (intval($zeit_ende) >= 0 && intval($zeit_beginn) < 0) {
             return self::TRANSLATABLE_NOT;
         }
+
+        if (intval($zeit_ende) % 100 === 0 and (intval($zeit_beginn) - 1) % 100 === 0) {
+            return self::TRANSLATABLE_CENTURY;
+        }
+
         if (intval($zeit_ende) < 0 && intval($zeit_beginn) < 0 || intval($zeit_ende) < 1000) {
             return self::TRANSLATABLE_AS_YEAR_WITH_SUFFIX;
         }
@@ -334,6 +388,40 @@ final class NodaTimeAutotranslater {
 
     }
 
+    /**
+     * Translates century names: 19. Jahrhundert.
+     *
+     * @param array<integer|string> $timeInfo Time information.
+     *
+     * @return array<string>
+     */
+    public static function translateYearsAsCentury(array $timeInfo):array {
+
+        // Beginn: 1500. (1501 - 1) / 100 + 1 = 16. 16th century is the time.
+        $start_cen = ((intval($timeInfo['zeit_beginn']) - 1) / 100) + 1;
+        // End: 1600. 16th century is the time.
+        $end_cen = (intval($timeInfo['zeit_ende']) / 100);
+
+        $suffixMode = self::getSuffixModeForYearsWSuffix((intval($timeInfo['zeit_beginn']) - 1), intval($timeInfo['zeit_ende']));
+
+        $output = [];
+
+        if ($start_cen === $end_cen) {
+            foreach (self::LANGS_CENTURY_FORMAT as $tLang => $format) {
+                $tLangValue = sprintf($format, (string)$start_cen);
+                $output[$tLang] = self::applyBcBceFormat($tLang, $tLangValue, $suffixMode);
+            }
+        }
+        else {
+            foreach (self::LANGS_CENTURIES_FORMAT as $tLang => $format) {
+                $tLangValue = sprintf($format, (string)$start_cen, (string)$end_cen);
+                $output[$tLang] = self::applyBcBceFormat($tLang, $tLangValue, $suffixMode);
+            }
+        }
+        return $output;
+
+    }
+
     /**
      * Translated years or timespans below 1000 CE.
      *
@@ -412,6 +500,10 @@ final class NodaTimeAutotranslater {
             return self::translateYearsUntilEnd($timeInfo);
         }
 
+        if ($translation_type === self::TRANSLATABLE_CENTURY) {
+            return self::translateYearsAsCentury($timeInfo);
+        }
+
         if ($translation_type === self::TRANSLATABLE_AS_YEAR_WITH_SUFFIX) {
             return self::translateYearsWithSuffix($timeInfo);
         }
diff --git a/src/NodaTimeSplitter.php b/src/NodaTimeSplitter.php
index 7baeba8..cccb19a 100644
--- a/src/NodaTimeSplitter.php
+++ b/src/NodaTimeSplitter.php
@@ -525,6 +525,32 @@ final class NodaTimeSplitter {
      */
     public static function is_incomplete_date(string $datum):array {
 
+        $datum = self::clean_input($datum);
+
+        if (preg_match("/^[0-9][0-9][0-9][0-9]\.[0-9][0-9]\.[0-9][0-9]\-$/", $datum)) { // Hungarian Y-m
+            $start = substr($datum, 0, 4);
+            $month = substr($datum, 5, 2);
+            $day = substr($datum, 8, 2);
+            return [$start, "?", $month, $day, "+", ""];
+        }
+        if (preg_match("/^[0-9][0-9][0-9][0-9]\.[0-9][0-9]\-$/", $datum)) { // Hungarian Y-m
+            $start = substr($datum, 0, 4);
+            $month = substr($datum, 5, 2);
+            return [$start, "?", $month, "00", "+", ""];
+        }
+
+        if (preg_match("/^\-[0-9][0-9][0-9][0-9]\.[0-9][0-9]\.[0-9][0-9]$/", $datum)) { // Hungarian Y-m
+            $start = substr($datum, 1, 4);
+            $month = substr($datum, 6, 2);
+            $day = substr($datum, 9, 2);
+            return ["?", $start, $month, $day, "+", ""];
+        }
+        if (preg_match("/^\-[0-9][0-9][0-9][0-9]\.[0-9][0-9]$/", $datum)) { // Hungarian Y-m
+            $start = substr($datum, 1, 4);
+            $month = substr($datum, 6, 2);
+            return ["?", $start, $month, "00", "+", ""];
+        }
+
         if (preg_match("/^(Ab|Seit|seit)\ /", $datum)) {
             if (($spacePos = strpos($datum, " ")) === false) {
                 return [];
@@ -546,7 +572,7 @@ final class NodaTimeSplitter {
         }
 
         // Endings beginning with a space
-        if (preg_match("/ (\(bis\))$/", $datum)) {
+        if (preg_match("/ (\(bis)$/", $datum)) {
             if (($spacePos = strrpos($datum, " ")) === false) {
                 return [];
             }
@@ -569,6 +595,51 @@ final class NodaTimeSplitter {
 
     }
 
+    /**
+     * Checks if an input date is a century.
+     *
+     * @param string $datum Input date.
+     *
+     * @return array<string>
+     */
+    public static function is_century(string $datum):array {
+
+        $datum = self::clean_input($datum);
+        $bcBceIndicator = '+';
+
+        // 17. Jahrhundert
+        if (preg_match("/^[0-9][0-9]\.\ (Jh\.|Jahrhundert|század)$/", $datum)) {
+            if ($centuryNo = intval(substr($datum, 0, 2))) {
+                $centuryNo--;
+                return [(string)$centuryNo . "01", strval($centuryNo + 1) . "00", "00", "00", $bcBceIndicator, ""];
+            }
+        }
+
+        // 1. Jahrhundert
+        if (preg_match("/^[0-9]\.\ (Jh\.|Jahrhundert|század)$/", $datum)) {
+            echo "HI";
+            if ($centuryNo = intval(substr($datum, 0, 1))) {
+                $centuryNo--;
+                return [(string)$centuryNo . "01", strval($centuryNo + 1) . "00", "00", "00", $bcBceIndicator, ""];
+            }
+        }
+
+        // 17.-18. Jahrhundert
+        if (preg_match("/^[0-9][0-9]\.\-[0-9][0-9]\.\ (Jh\.|Jahrhundert|század)$/", $datum)) {
+            return [(string)(intval(substr($datum, 0, 2)) - 1) . "01", substr($datum, 4, 2) . "00", "00", "00", $bcBceIndicator, ""];
+        }
+        if (preg_match("/^[0-9][0-9]\-[0-9][0-9]\.\ (Jh\.|Jahrhundert|század)$/", $datum)) {
+            return [(string)(intval(substr($datum, 0, 2)) - 1) . "01", substr($datum, 3, 2) . "00", "00", "00", $bcBceIndicator, ""];
+        }
+
+        if (preg_match("/^[0-9]\.\-[0-9]\.\ (Jh\.|Jahrhundert|század)$/", $datum)) {
+            return [(string)(intval(substr($datum, 0, 1)) - 1) . "01", substr($datum, 3, 1) . "00", "00", "00", $bcBceIndicator, ""];
+        }
+
+        return [];
+
+    }
+
     /**
      * Wrapper to check if any splitting command works.
      *
@@ -582,6 +653,7 @@ final class NodaTimeSplitter {
         if (!$moda) $moda = NodaTimeSplitter::is_incomplete_date($datum);
         if (!$moda) $moda = NodaTimeSplitter::is_valid_date($datum);
         if (!$moda) $moda = NodaTimeSplitter::is_valid_date_hungarian($datum);
+        if (!$moda) $moda = NodaTimeSplitter::is_century($datum);
 
         return $moda;