diff --git a/libavformat/movenc.c b/libavformat/movenc.c
index 799c26fd55..b9c0f7ae67 100644
--- a/libavformat/movenc.c
+++ b/libavformat/movenc.c
@@ -5370,13 +5370,7 @@ static int mov_write_header(AVFormatContext *s)
         mov_write_mdat_tag(pb, mov);
     }
 
-    if (t = av_dict_get(s->metadata, "creation_time", NULL, 0)) {
-        mov->time = ff_iso8601_to_unix_time(t->value);
-        if (mov->time < 0) {
-            av_log(s, AV_LOG_WARNING, "Failed to parse creation_time %s\n", t->value);
-            mov->time = 0;
-        }
-    }
+    ff_parse_creation_time_metadata(s, &mov->time, 1);
     if (mov->time)
         mov->time += 0x7C25B080; // 1970 based -> 1904 based