$re = '/(Jan(?:uary)?|Feb(?:ruary)?|Mar(?:ch)?|Apr(?:il)?|May|June?|July?|Aug(?:ust)?|Sep(?:tember)?|Oct(?:ober)?|Nov(?:ember)?|Dec(?:ember)?)\s(\d\d?)(st|nd|rd|th)?,?\s(\d{4})|(\d\d?)[\.\/-](\d\d?)[\.\/-](\d{4})/m';
$str = '03.24.2014
Jan 13 2021
January 29, 2007
Jan 9 2003
12/25/2008
July 7th, 2022
03-16-2000
08-28-2020
June 21 2019
04-24-2008
October 31st 2018
June 20, 2000
August 29th 2005
Dec 12th, 2019
April 5 2004
Feb 7 2020
July 9th, 2011
Aug 18 2015
01.27.2020
December 27, 2022
04-05-2005
07/19/2001
08/21/1999
August 31st, 2004
November 18th 2015
Feb 25 2006
February 27th 2011
September 29th, 1999
Nov 13, 2017
Aug 19th 2014
Nov 24 1999
Oct 25 2015
11/01/2019
02/11/2017
11.30.2019
05.26.2002
Jan 14 1998
May 5, 1998
04-24-1998
November 23 2006
Mar 21, 1999
April 6, 2013
Jun 4th, 2012
Oct 16th, 2000
08/07/2021
May 8, 2003
October 30th, 2021
07/27/1998
03.30.2007
08/12/2005
May 23 2020
01/18/2019
09/04/2013
December 17, 2022
06.30.2012
Jul 23rd 2022
10.28.1998
February 16th 1998
05-20-2008
September 27th, 2002
03.27.2004
08/11/2015
May 29th, 2006
02-19-2005
02/08/2018
June 14, 2003
January 18th, 2000
Jun 9th 2022
02.12.2003
06/15/2015
April 16th, 2001
April 13th, 2011
Nov 7, 1998
02.19.2015
03/18/2009
12/19/2005
July 25th, 1998
08.06.2022
October 5, 2016
October 1, 2022
03-13-2013
06-03-1999
Nov 29th 2005
Jul 9, 2014
10-10-1999
August 19 2016
Apr 5, 2016
09.26.1999
10/15/2007
12.04.2018
12-08-2008
Jul 13, 2022
12.23.2006
December 8, 2011
June 4th 2004
10.07.2007
June 19th 2002
09.05.2011
December 15, 2009
12/17/2007
08-25-2017
September 13, 2000
11-29-2006
12-11-2000
01/25/2016
09/13/2014
Dec 30 2017
05/28/2018
January 31 2020
November 7th 2002
July 14 2008
08.31.2009
October 25 2018
01/09/1999
09/16/2007
04/01/2013
12-15-2000
Oct 16 2004
10.25.2009
Aug 7 2001
April 13th 2020
April 11th 2001
02/20/2011
Aug 4 2008
Jul 25 2017
November 1, 2010
July 7 2000
December 15, 2013
12.04.2018
03/21/2014
11/15/2004
September 6th, 2003
May 15th, 2010
February 7 2011
06/10/2021
02-13-2016
02.10.2012
08-20-1998
Aug 24, 2007
04.27.2014
03/08/2019
09-09-2020
September 10th, 2022
May 11th, 2002
11/05/2015
01-29-2003
Aug 27th, 2000
Oct 11, 2013
12/12/2002
Nov 16 2007
October 13th, 2008
10-12-2017
02/16/1999
04.13.2013
Aug 19, 2020
February 9th, 2018
Sep 27, 2002
April 27th, 2005
February 17, 2005
Apr 6 1998
July 17, 2020
10/22/2000
11/29/2019
Jan 5 2018
08/12/1998
10.07.1998
07/21/2021
03.22.2006
04-19-2002
Feb 26th, 2022
Mar 18 2017
February 10, 2013
September 24, 2021
07-14-2003
Feb 1st, 2019
March 23, 2022
11/22/2014
May 10 2014
Mar 13th, 2008
05.27.2014
Jun 22, 2010
Jun 26th 2020
Sep 7, 2002
June 19 2004
03-26-2015
07.27.2005
02/24/1998
February 13th 2010
08-18-2012
May 27 1999
August 7th 2001
07.27.2001
January 25 2006
07.31.2003
November 1st, 2007
04.13.2010
11.03.2021
Oct 6, 2019
February 10 2015
01.11.2000
05.16.2016
11.16.2019
01-16-2003
December 31st 2018
04.15.2014
Jul 17th 2007
11-07-2021
05-10-2007
02-01-2007
May 31st, 2004
July 4th 2018
Jun 28 2018
Nov 17 2002
Jun 24, 2006
March 26 2022
10/18/1998
Jul 2nd 1998
March 25th, 2020
Jul 30th 2021
08.24.2017
October 8, 2006
10.24.2002
May 8 2020
Apr 16th 2006
10.20.2005
05/05/2001
10/21/2020
05/20/2020
11/09/2015
12-16-2011
Nov 8, 2019
02-10-2015
September 26th 2012
May 11th 2020
Dec 23rd, 2005
May 14th 1998
01.16.2004
Oct 28 1999
July 5th 2006
05-09-2018
10.28.2017
Jun 1, 2004
Feb 3rd, 2002
07.31.2004
Jan 26 2009
12/04/2009
Jan 21st, 2020
February 18 2015
10.28.2018
Oct 16th, 2020
February 23, 2002
08-29-2001
August 22 2002
June 22nd, 2009
09.06.2006
Oct 14th 2003
October 24th, 2005
09-30-2000
September 24th 2007
11-19-2020
03-21-2004
02/24/2004
08/30/2011
September 27 2003
Aug 3 2003
August 15, 2014
October 17 2019
June 26th 2011
05.16.2021
12-21-2018
August 19th 2003
June 2nd, 2022
November 11th, 1999
August 10 2012
Jan 28th 2019
Jun 10th 2012
Jan 18th, 2014
October 30, 2015
April 21 2000
August 18 2002
September 1, 2014
Sep 9th 2003
09-16-2007
May 3rd, 2003
March 16, 2016
Jul 24 2002
08-19-1999
February 3, 2013
January 17 2010
11-12-2002
January 29 2006
04.24.2004
Aug 25, 2002
October 16 2001
August 15 2022
06-20-2011
06-27-2004
December 28, 2015
Apr 1st 2004
Sep 21, 2002
Oct 19th, 2007
August 12, 1999
January 29, 2012
04.01.1998
10.06.2021
October 31, 2012
April 28th, 2017
March 5, 2019
04/01/2016
03.12.2016
Dec 23rd, 2010
02-15-2022
January 14 2016
05/23/2019
07.10.2012
Sep 25th, 2001
10/14/2003
March 30th 2021
April 25th, 1999
Mar 20th 2015
Apr 17th, 2011
11-30-2007
04/21/2001
08/07/2006
November 15 2002
11-30-2014
07/26/2013
February 8, 2020
06.17.1999
01/13/2002
10/19/2009
12-20-2020
March 5 2001
10.05.2010
Feb 22nd, 2020
May 25th, 2013
12-06-1998
09.05.2013
05.09.2014
12/30/2016
May 2 2003
07.10.2006
07.17.2011
11/04/2006
April 29 2018
03-27-2005
May 1, 2006
02.23.2002
03.02.1998
12/12/2002
08-08-2002
08/31/2018
05-10-2011
07.10.2015
12.02.2012
Aug 4, 2022
06.12.2021
01.13.2020
October 1st 1998
August 19, 2013
Mar 18 2021
06.18.2009
08.12.2012
10-03-2022
04-21-2018
10/30/2015
May 14 2019
05/22/2012
02.18.2014
03.20.2022
01.09.2006
March 2 2014
Mar 16 2011
10-08-1999
09-14-2010
11.23.2002
April 28th, 2004
04-12-2007
June 1st 2003
July 2nd 2007
December 14, 2016
10/26/2019
February 11th 2015
February 12th, 2018
01/08/2004
September 22nd, 2004
August 17th, 2000
November 22nd 2021
June 10th 2003
Jul 17th 1999
09-01-2014
July 21st 2015
January 11 2013
03/04/2005
02-08-2018
Mar 20, 2001
04/03/2016
September 11, 2021
01/30/2016
April 8 2009
05/08/2010
Jan 15th 2008
02-13-2022
Apr 15th, 2016
Sep 4 2020
Nov 10, 2008
March 30 2014
07.27.2005
01.27.2021
June 9th 2021
Feb 23rd, 2020
06.05.2015
02-23-2000
Feb 12, 2020
May 1st 1998
03/08/2017
03-27-2007
July 13, 1998
01/01/2000
Apr 2, 1998
02.14.2014
Mar 22 2005
Jan 4 2012
08-28-2015
Jan 21st, 2015
Jul 7th, 2006
05-04-2004
Apr 4, 1999
11/04/2016
10-26-2009
June 22 2006
08/24/2022
12-14-2012
Feb 28, 2001
09/21/2000
Aug 24, 2016
October 22nd, 2001
June 21, 2005
August 27th, 2018
Feb 26th, 2020
February 14th, 2012
06.01.2008
07/20/2017
02.10.2022
July 27th 2009
10-08-2016
09/03/2005
Apr 12, 2005
Nov 22 2016
Mar 24, 2002
Sep 5, 1999
March 29th 1999
Feb 4, 1999
08/17/2002
November 13 2014
02-08-2013
Aug 1, 2009
Oct 8, 2015
03-20-2003
Mar 16, 2012
Nov 4 2017
Jan 28th, 2008
10-13-2017
Oct 24th 2012
Jul 11, 2003
Apr 17 2013
November 20th, 2020
09.06.2013
June 2, 2012
09/13/2010
Sep 28th, 2000
07-06-2005
Dec 13 2007
September 4 2004
June 20, 2010
12/28/2013
Mar 24 2004
March 8, 2012
02-18-2008
April 24 2013
02-27-2003
03.10.2022
Jul 18 2020
02-05-2004
03/26/2014
September 18th 1999
04/04/2021
June 10th, 2014
Jul 6th, 2007
April 21st 2022
09-17-2012
09/17/1999
03.22.1998
06/15/2000
January 11 2008
March 5, 1999
11/07/2011
04/22/2017
05-21-2012
Aug 2 2011';
preg_match_all($re, $str, $matches, PREG_SET_ORDER, 0);
// Print the entire match result
var_dump($matches);
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for PHP, please visit: http://php.net/manual/en/ref.pcre.php