/usr/share/mailutils/mh/scan.time is in mailutils-mh 1:3.4-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 | %; "Time"-format for GNU MH scan.
%;
%; GNU Mailutils -- a suite of utilities for electronic mail
%; Copyright (C) 2003, 2010-2012, 2014-2017 Free Software Foundation,
%; Inc.
%; Distributed under GPLv3+. See <http://gnu.org/licenses/gpl.html>.
%;
%; This format is similar to scan.default, except that it prints the
%; date in 1-minute resolution and adds a timezone.
%;
%4(msg)\
%<(cur)+%| %>\
%<{replied}-%?{encrypted}E%| %>\
%02(mon{date})/%02(mday{date})\
%02(hour{date}):%02(min{date})%3(tzone{date})\
%<{date} %|*%>\
%<(mymbox{from})%<{to}To:%14(decode(friendly{to}))%>%>\
%<(zero)%17(decode(friendly{from}))%>\
%(decode{subject})%<{body}<<%{body}%>
%; End of scan.time
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