Only call isoformat if the date value inserted by SMPP is still a date.
Only call isoformat if the date value inserted by SMPP is still a date.

harrissoerja/vumi,TouK/vumi,harrissoerja/vumi,TouK/vumi,vishwaprakashmishra/xmatrix,TouK/vumi,vishwaprakashmishra/xmatrix,vishwaprakashmishra/xmatrix,harrissoerja/vumi