regex - How to extract the last date and time within a string of text in excel -


i having problem trying figure out how can extract date , time of last correspondence in string of text on excel spread sheet.
each correspondence within each cell begins "additional information" , followed time stamp, ends in "cet" seen below (please note have replaced body text blah, blah, blah):

example cell:

additional information   4/15/15   4:29 pm cet   ronald ben  per phone conversation blah, blah, blah, blah, blah, blah, blah thank  ---------------------------  additional information   4/15/15   3:31 pm cet   ben inspected blah, blah,blah, blah, blah, blah, blah, blah, blah, blah, blah  ---------------------------  additional information   4/13/15   8:02 pm cet   michael hi craig  per blah, blah,blah, blah, blah, blah, blah  ---------------------------  additional information   4/13/15   7:19 pm cet   craig hello michael, blah, blah,blah  ---------------------------  additional information   4/13/15   2:42 pm cet   blah, blah,blah  ---------------------------  additional information   4/10/15   10:46 pm cet   mark hello craig, blah, blah,blah 

the length of text string varies cell cell, each structured same way.

in above example last time stamp should outputted 4/10/15 10:46 pm.

i tried use regexextract function, not working reason.

any appreciated.

i'm not sure regex best solution if have static text starting each entry date/time string can located , peeled out. cdate function convert both date , time portions in single stroke.

mydatetime  = cdate(mid(range("a1").value2, 23, 21)) 

while regex may make nice solution more dynamic text entries, isn't necessary here.