diff --git a/parseany.go b/parseany.go
index 073f320..81de181 100644
--- a/parseany.go
+++ b/parseany.go
@@ -574,7 +574,12 @@ iterRunes:
 		}
 		if t.IsZero() {
 			if secs, err := strconv.ParseInt(datestr, 10, 64); err == nil {
-				t = time.Unix(secs, 0)
+				if secs < 0 {
+					// Now, for unix-seconds we aren't going to guess a lot
+					// nothing before unix-epoch
+				} else {
+					t = time.Unix(secs, 0)
+				}
 			}
 		}
 		if !t.IsZero() {
diff --git a/parseany_test.go b/parseany_test.go
index 7a35dca..29bc70d 100644
--- a/parseany_test.go
+++ b/parseany_test.go
@@ -468,6 +468,9 @@ func TestParse(t *testing.T) {
 
 	_, err = ParseAny("138421636711122233311111") // too many digits
 	assert.NotEqual(t, nil, err)
+
+	_, err = ParseAny("-1314")
+	assert.NotEqual(t, nil, err)
 }
 
 func testDidPanic(datestr string) (paniced bool) {