DATEVALUE

11:01:14 Converts a date in the form of text to a serial number.
11:01:14 Warning: The PhpSpreadsheet DATEVALUE() function accepts a wider range of date formats than MS Excel DATEFORMAT() function.
11:01:14 Date String: 26 March 2012
11:01:14 Formula: =DATEVALUE(A1)
11:01:14 Excel DateStamp: 40994
11:01:14 Formatted DateStamp2012-Mar-26
11:01:14
11:01:14 Date String: 29 Feb 2012
11:01:14 Formula: =DATEVALUE(A2)
11:01:14 Excel DateStamp: 40968
11:01:14 Formatted DateStamp2012-Feb-29
11:01:14
11:01:14 Date String: April 1, 2012
11:01:14 Formula: =DATEVALUE(A3)
11:01:14 Excel DateStamp: 41000
11:01:14 Formatted DateStamp2012-Apr-01
11:01:14
11:01:14 Date String: 25/12/2012
11:01:14 Formula: =DATEVALUE(A4)
11:01:14 Excel DateStamp: 41268
11:01:14 Formatted DateStamp2012-Dec-25
11:01:14
11:01:14 Date String: 2012-Oct-31
11:01:14 Formula: =DATEVALUE(A5)
11:01:14 Excel DateStamp: 41213
11:01:14 Formatted DateStamp2012-Oct-31
11:01:14
11:01:14 Date String: 5th November
11:01:14 Formula: =DATEVALUE(A6)