SYMPTOM:
Currently in Strategy 9.x, when creating a subscription its timestamp is displayed as part of the subscription name as in the example below:

However, once the subscription name is edited, there is no other way to figure out which is the subscription creation timestamp other than querying it in the metadata tables using the Strategy DB Query Tool with following statement:
SELECT DISP_NAME,CREATION_TIME FROM DSSCSSUBINST;
CAUSE:
This is working as designed and an enhancement request has been logged.
ACTION:
Please contact the Strategy Technical Support for an update on this issue.