Improve date parser to handle various broken date formats

reader/date/parser.go

@@ -211,6 +211,14 @@ var dateFormats = []string{
 	"Jan. 2, 2006, 03:04 p.m.",
 	"2006-01-02 15:04:05 -07:00",
 	"2 January, 2006",
+	"2 Jan 2006 MST",
+	"Mon, January 2, 2006 at 03:04 PM MST",
+	"Jan 2, 2006 15:04 MST",
+	"01/02/2006 3:04 pm MST",
+	"Mon, 2th Jan 2006 15:04:05 MST",
+	"Mon, 2rd Jan 2006 15:04:05 MST",
+	"Mon, 2nd Jan 2006 15:04:05 MST",
+	"Mon, 2st Jan 2006 15:04:05 MST",
 }
 
 var invalidTimezoneReplacer = strings.NewReplacer(

reader/date/parser_test.go

@@ -179,6 +179,12 @@ func TestParseWeirdDateFormat(t *testing.T) {
 		"mar., 01 déc. 2020 16:11:02 +0000",
 		"Thurs, 15 Oct 2020 00:00:39 +0000",
 		"Thur, 19 Nov 2020 00:00:39 +0000",
+		"26 Sep 2022 GMT",
+		"Thu, June 22, 2023 at 01:11 PM EDT",
+		"Apr 16, 2023 08:01 GMT",
+		"Jun 23, 2023 19:00 GMT",
+		"09/15/2014 4:20 pm PST",
+		"Fri, 23rd Jun 2023 09:32:20 GMT",
 	}
 
 	for _, date := range dates {