How can I search for the time a Project name was updated ?

[Veeraj Bissoonauth]

Hi,

As part of our JIRA activity, our BA moves user stories from one triage backlog (B1) to other backlogs where the actual projects are defined. During this process, the user story ID changes.

I wanted to find out how long a user story spent in B1. 

my approach:

(a) I know the time the user story was created in B1 --- T1

(b) I want to know when/the time  the user story Project name -- T2

the my answer would be T2 MINUS T1.

Am trying to fine T2.

Can anyone give me some guidance ? wanted to use JQL if possible.

Thank you,

Veeraj