Comment (by Zach Etienne):

Okay, I didn’t realize it would be so complicated. As a workaround I would suggest:

+\cactustitlepage{Reference Manual}{commit \gitrevision{../../.git}}{\today}

be adjusted to

+\cactustitlepage{Reference Manual}{commit \gitrevision{../../.git}}{Documentation compiled on: \today}

or something like this, just to make clear that the date should be associated with the date of documentation compilation, and not the git commit.

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Ticket URL: https://bitbucket.org/einsteintoolkit/tickets/issues/2330/include-date-of-build-and-git-hash-in