title: ISO-8601 String to Date in Google Sheets cell
body: <p>I have a bunch of ISO-8601 formatted strings in a column of my sheet.  How can I get google sheets to treat them as Dates so I can do math on them (difference in minutes between two cells, for example)?  I tried just <code>=Date("2015-05-27T01:15:00.000Z")</code> but no-joy.  There has to be an easy way to do this.  Any advice?</p>