assert(parseDate("8 Feb 2017 15:21:13 +0000").toISOExtString == "2017-02-08T15:21:13+00:00"); assert(parseDate("8 Feb 2017 15:21:13 +0530").toISOExtString == "2017-02-08T15:21:13+05:30"); assert(parseDate("18 Feb 2017 15:21:13 +0000").toISOExtString == "2017-02-18T15:21:13+00:00"); assert(parseDate("18 Feb 2017 15:21:13 +0530").toISOExtString == "2017-02-18T15:21:13+05:30");