ruby datetime parse
DateTime.parse('2001-02-03T04:05:06+07:00')
#=> #<DateTime: 2001-02-03T04:05:06+07:00 ...>
DateTime.parse('20010203T040506+0700')
#=> #<DateTime: 2001-02-03T04:05:06+07:00 ...>
DateTime.parse('3rd Feb 2001 04:05:06 PM')
#=> #<DateTime: 2001-02-03T16:05:06+00:00 ...>