[CentOS] Any reliable way to determine LVM snapshot creation time?

We utilize LVM snapshots for some periodic maintenance.  They're
manually created and, usually, manually destroyed.

But not always.

So there's now a nightly script monitoring for open snapshots.

Which raises the question of when a given snapshot was created.

Absent good practices of, say, using sudo to create snapshots (leaving a
/var/log/secure message), is there any reasonably reliable way to
determine when an LVM was created?

There's a timestamp on the /dev/mapper/<snapshot> file.  I'm presuming
that's somewhat useful for this purpose?

Ah:  just found /var/log/messages also indicates:

    lvm[2314]: Monitoring snapshot <name>
    lvm[2314]: No longer monitoring snapshot <name>

... which I think answers my own question.  Posting here for Google's
sake and/or discussion.

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