diff --git a/CHANGELOG.md b/CHANGELOG.md
index c7f1b244..11b581b4 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,7 @@
 
 ## 3.7.3.dev
 * Extension: expose RADICALE:version for authenticated users via PROPFIND
+* Fix: sharing: GET request on single item with bday conversion
 
 ## 3.7.2
 * Fix: broken storage/mtime granularity detection on vfat
diff --git a/radicale/app/get.py b/radicale/app/get.py
index b1e46540..a0139560 100644
--- a/radicale/app/get.py
+++ b/radicale/app/get.py
@@ -121,7 +121,10 @@ class ApplicationPartGet(ApplicationBase):
             elif limited_access:
                 return httputils.NOT_ALLOWED
             else:
-                content_type = xmlutils.OBJECT_MIMETYPES[item.name]
+                if share and share['Conversion'] == "bday":
+                    content_type = xmlutils.MIMETYPES["VCALENDAR"]
+                else:
+                    content_type = xmlutils.OBJECT_MIMETYPES[item.name]
                 content_disposition = ""
             assert item.last_modified
             headers = {
@@ -130,9 +133,16 @@ class ApplicationPartGet(ApplicationBase):
                 "ETag": item.etag}
             if content_disposition:
                 headers["Content-Disposition"] = content_disposition
-            if isinstance(item, storage.BaseCollection) and share and share['Conversion'] == "bday":
-                # convert VCF to ICS
-                answer = item.serialize(vcf_to_ics=True)
+            if share and share['Conversion'] == "bday":
+                if isinstance(item, storage.BaseCollection):
+                    # convert VCF to ICS
+                    answer = item.serialize(vcf_to_ics=True)
+                else:
+                    item_converted = item.convert_vcf_to_ics()
+                    if item_converted is not None:
+                        answer = item_converted.serialize()
+                    else:
+                        return httputils.NOT_FOUND
             else:
                 answer = item.serialize()
             return client.OK, headers, answer, None
diff --git a/radicale/sharing/__init__.py b/radicale/sharing/__init__.py
index ba2c5f6b..109b292d 100644
--- a/radicale/sharing/__init__.py
+++ b/radicale/sharing/__init__.py
@@ -497,6 +497,9 @@ class BaseSharing:
                     logger.info("sharing/%s: resolved path %r->%r, user %r->%r not enabled by user", "map", path, result['PathMapped'], user, result['Owner'])
                     return {'error': 'map-not-enabled'}
 
+                if result['Conversion'] == "bday" and result['PathMapped'].endswith(".ics"):
+                    result['PathMapped'] = result['PathMapped'].removesuffix(".ics") + ".vcf"
+
                 logger.info("sharing/%s: resolved path %r->%r, user %r->%r, Permissions=%r Conversion=%r", "map", path, result['PathMapped'], user, result['Owner'], result['Permissions'], result['Conversion'])
                 return result
 
diff --git a/radicale/tests/test_sharing.py b/radicale/tests/test_sharing.py
index c89b651c..9ec5b566 100644
--- a/radicale/tests/test_sharing.py
+++ b/radicale/tests/test_sharing.py
@@ -4838,6 +4838,27 @@ permissions: RrWw""")
             assert path_shared_r + "contact3-with-bday.ics" in responses
             assert path_shared_r + "contact1.ics" not in responses
 
+            # verify content as user
+            logging.info("\n*** GET item as  user -> ok")
+            _, headers, answer = self.request("GET", path_shared_r + "contact2-with-bday.ics", login="user:userpw")
+            logging.debug("resonse: %r", answer)
+            assert "BEGIN:VCARD" not in answer
+            assert "BEGIN:VCALENDAR" in answer
+            assert "RRULE:FREQ=YEARLY" in answer
+            assert "DTSTART;VALUE=DATE:19700101" in answer
+            assert "DTEND;VALUE=DATE:19700102" in answer
+            assert "TRANSP:TRANSPARENT" in answer
+            assert "DESCRIPTION:BDAY=1970-01-01" in answer
+            # content type must be adjusted
+            assert 'Content-Type' in headers
+            assert 'text/calendar' in headers['Content-Type']
+            # title from Properties
+            assert 'Content-Disposition' not in headers
+
+            # get a single item which is not exsting on conversion
+            logging.info("\n*** GET item as  user -> ok")
+            _, headers, answer = self.request("GET", path_shared_r + "contact1.ics", login="user:userpw", check=404)
+
             # timerange filter elements as user
             logging.info("\n*** REPORT collection entries with timerange user -> ok")
             _, responses = self.report(path_shared_r, """\