modify default NaiveDate value 1970-01-01

src/lib.rs

@@ -710,8 +710,10 @@ impl Parser {
         ignoretz: bool,
         tzinfos: &HashMap<String, i32>,
     ) -> ParseResult<(NaiveDateTime, Option<FixedOffset>, Option<Vec<String>>)> {
-        let default_date = default.unwrap_or(&Local::now().naive_local()).date();
+        // If default is none, 1970-01-01 00:00:00 as default value is better.
-
+        let default_date = default
+            .unwrap_or(&NaiveDate::default().and_hms_opt(0, 0, 0).unwrap())
+            .date();
         let default_ts =
             NaiveDateTime::new(default_date, NaiveTime::from_hms_opt(0, 0, 0).unwrap());
 

src/tests/fuzzing.rs

@@ -160,4 +160,15 @@ fn github_46() {
             panic!();
         }
     }
+
+    parse_result = parse("2000");
+    match parse_result {
+        Ok((dt, offset)) => {
+            assert_eq!(format!("{:?}", dt), "2000-01-01T00:00:00".to_string());
+            assert!(offset.is_none());
+        }
+        Err(_) => {
+            panic!();
+        }
+    }
 }