@jpmens https://jpmens.net/2021/09/09/specifying-duration-in-bind-s-named-conf/ "(I hope “just a moment ago” is a valid time specification ..)"

No:
% date --date "just a moment ago"
date: invalid date ‘just a moment ago’

You have to be more specific:

% date --date "minute ago"
Thu Sep 9 16:29:51 CEST 2021