Sure thing. Just done it now.

On Wed, Jan 31, 2018 at 3:04 AM, Daniel Kahn Gillmor <dkg@fifthhorseman.net> wrote:
On Mon 2018-01-29 16:13:38 +0000, Matthew Lear wrote:
> [ Jani wrote: ]
>> Alternatively, you can use @<timestamp> in date: queries, although this
>> seems to be completely undocumented:
>
> I guess this relates to similar syntax requirements of date -d in that a
> unix timestamp is required to be preceded by an @

agreed, it seems in line with that.

Matthew, since you've been reading the docs there most recently, maybe
you'd be up for sending a patch to make sure this feature is findable in
the documentation?
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    --dkg
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