Is there a way in batch to change the Late time for all events?
Yes use JCLEVENT
// EXEC JCLEVNT,SIZE=JCLEVNT FILE MASTER UPDATE=YES SELECT * REPLACE LATE : 3700 REPLACE ABORT : 3900 /*
SELECT * means ALL events, you can change the SELECT to do specific events
SELECT GSA* (GROUP EQ GLA435) (change all events starting with GSA in group GLA435
SELECT * (GROUP EQ GLA435) (change all events in group GLA435
This job can be run with UPDATE=NO. The output will show what changes will be made, so you can check it it is correct.