diff --git a/src/documents/parsers.py b/src/documents/parsers.py
index ae19d5b53..72aea0387 100644
--- a/src/documents/parsers.py
+++ b/src/documents/parsers.py
@@ -37,13 +37,14 @@ from documents.utils import run_subprocess
 # TODO: isn't there a date parsing library for this?
 
 DATE_REGEX = re.compile(
-    r"(\b|(?!=([_-])))([0-9]{1,2})[\.\/-]([0-9]{1,2})[\.\/-]([0-9]{4}|[0-9]{2})(\b|(?=([_-])))|"
-    r"(\b|(?!=([_-])))([0-9]{4}|[0-9]{2})[\.\/-]([0-9]{1,2})[\.\/-]([0-9]{1,2})(\b|(?=([_-])))|"
-    r"(\b|(?!=([_-])))([0-9]{1,2}[\. ]+[a-zA-ZÀ-ÖØ-öø-ÿ]{3,9} [0-9]{4}|[a-zA-ZÀ-ÖØ-öø-ÿ]{3,9} [0-9]{1,2}, [0-9]{4})(\b|(?=([_-])))|"
-    r"(\b|(?!=([_-])))([^\W\d_]{3,9} [0-9]{1,2}, ([0-9]{4}))(\b|(?=([_-])))|"
-    r"(\b|(?!=([_-])))([^\W\d_]{3,9} [0-9]{4})(\b|(?=([_-])))|"
-    r"(\b|(?!=([_-])))([0-9]{1,2}[^ ]{2}[\. ]+[^ ]{3,9}[ \.\/-][0-9]{4})(\b|(?=([_-])))|"
-    r"(\b|(?!=([_-])))(\b[0-9]{1,2}[ \.\/-][a-zA-ZÀ-ÖØ-öø-ÿ]{3}[ \.\/-][0-9]{4})(\b|(?=([_-])))",
+    r"(\b|(?!=([_-])))(\d{1,2})[\.\/-](\d{1,2})[\.\/-](\d{4}|\d{2})(\b|(?=([_-])))|"
+    r"(\b|(?!=([_-])))(\d{4}|\d{2})[\.\/-](\d{1,2})[\.\/-](\d{1,2})(\b|(?=([_-])))|"
+    r"(\b|(?!=([_-])))(\d{1,2}[\. ]+[a-zéûäëčžúřěáíóńźçŞığü]{3,9} \d{4}|[a-zéûäëčžúřěáíóńźçŞığü]{3,9} \d{1,2}, \d{4})(\b|(?=([_-])))|"
+    r"(\b|(?!=([_-])))([^\W\d_]{3,9} \d{1,2}, (\d{4}))(\b|(?=([_-])))|"
+    r"(\b|(?!=([_-])))([^\W\d_]{3,9} \d{4})(\b|(?=([_-])))|"
+    r"(\b|(?!=([_-])))(\d{1,2}[^ ]{2}[\. ]+[^ ]{3,9}[ \.\/-]\d{4})(\b|(?=([_-])))|"
+    r"(\b|(?!=([_-])))(\b\d{1,2}[ \.\/-][a-zéûäëčžúřěáíóńźçŞığü]{3}[ \.\/-]\d{4})(\b|(?=([_-])))",
+    re.IGNORECASE,
 )