diff --git a/parseany.go b/parseany.go
index f1501bd..586efec 100644
--- a/parseany.go
+++ b/parseany.go
@@ -635,9 +635,22 @@ iterRunes:
 			switch r {
 			case '-', '\u2212':
 				p.molen = i - p.moi
+
+				// Must be a valid short or long month
+				if p.molen == 3 {
 				p.set(p.moi, "Jan")
 				p.yeari = i + 1
 				p.stateDate = dateDigitDashAlphaDash
+				} else {
+					possibleFullMonth := strings.ToLower(p.datestr[p.moi:(p.moi + p.molen)])
+					if i > 3 && isMonthFull(possibleFullMonth) {
+						p.fullMonth = possibleFullMonth
+						p.yeari = i + 1
+						p.stateDate = dateDigitDashAlphaDash
+					} else {
+						return p, p.unknownErr(datestr)
+					}
+				}
 			default:
 				if !unicode.IsLetter(r) {
 					return p, p.unknownErr(datestr)
diff --git a/parseany_test.go b/parseany_test.go
index 6284607..5ffe5fd 100644
--- a/parseany_test.go
+++ b/parseany_test.go
@@ -403,7 +403,7 @@ var testInputs = []dateTest{
 	{in: "15-Jan-2017", out: "2017-01-15 00:00:00 +0000 UTC"},
 	{in: "28-Feb-02 15:16:17", out: "2002-02-28 15:16:17 +0000 UTC"},
 	{in: "15-Jan-18 15:16:17", out: "2018-01-15 15:16:17 +0000 UTC"},
-	{in: "15-Jan-2017 15:16:17", out: "2017-01-15 15:16:17 +0000 UTC"},
+	{in: "15-September-2017 15:16:17", out: "2017-09-15 15:16:17 +0000 UTC"},
 	//   dd-mm-yy (digit month - potentially ambiguous) - https://github.com/araddon/dateparse/issues/139
 	{in: "28-02-02", out: "2002-02-28 00:00:00 +0000 UTC"},
 	{in: "15-01-18", out: "2018-01-15 00:00:00 +0000 UTC"},