Fast response is needed.
stupid requirement... urgency is your problem, not ours
replying on a forum is on
free of charge
in plain words when and if we feel like
if You have time constraint You should consider hiring a paid consultant.
it would have been wiser to post all the needed info to start with
for example You say date 26-29 but that' s 4 bytes, the sample data shows 7 bytes, ( in a format wich looks like YYYYDDDD )
the only urgent thing is for You how to learn to ask questions in a better way
jcl in se will do nothing,
since you talk about SORT You should have been able to choose a better forum to ask
DFSORT ( messages prefixed with ICE )
SYNCSORT ( messages prefixed with WER )