convert to date format

[#1]

Hi

Please convert the following string into a date and time format like this 'yyyy-mm-dd hh:mm:s'

The input string is '20161020T074931.000-0500'.

Here 2016- yyyy,

10-mm,

20-dd,

07- hh

49- mm

31- ss.

[#2]

Hi Plz look into attachment.