Process Chain Start time in job Completion Mail Notification

Hello,

We have process chain scheduled which on completion, mails are triggered notifying the completion.

How can we add the start time of the job which was completed?

Eg: A job starts at 9:00 Am and it completes at 11:00 AM - So around 11:05 AM , a completion mail notification is sent to users. but how can we add the data that this job was started at 9:00 AM

Thanks,

Hetal