git: 2e25db21976b - stable/13 - date(1): Improve manpage around '-I'

The branch stable/13 has been updated by michaelo:

URL: https://cgit.FreeBSD.org/src/commit/?id=2e25db21976b04a6c62ba927ed0a8bea583bc07f

commit 2e25db21976b04a6c62ba927ed0a8bea583bc07f
Author:     Michael Osipov <michaelo@FreeBSD.org>
AuthorDate: 2025-08-31 20:06:00 +0000
Commit:     Michael Osipov <michaelo@FreeBSD.org>
CommitDate: 2025-09-04 14:55:50 +0000

    date(1): Improve manpage around '-I'
    
    * ISO 8601 defines two formats: basic and extended, clarify that we
      output the extended format only.
    * Clarify that ISO 8601 is only aware of timezone /offsets/, not timezones,
      it has no relation to the Olson timezone database (TZ environment variable).
    
    Reviewed by:    otis (mentor), des
    MFC after:      3 days
    Differential Revision:  https://reviews.freebsd.org/D52314
    
    (cherry picked from commit 21628c79d541b55b5e60231cefec73ca31719b6d)
---
 bin/date/date.1 | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/bin/date/date.1 b/bin/date/date.1
index 39a314214da6..3f1f513fcee5 100644
--- a/bin/date/date.1
+++ b/bin/date/date.1
@@ -31,7 +31,7 @@
 .\"
 .\"     @(#)date.1	8.3 (Berkeley) 4/28/95
 .\"
-.Dd February 27, 2023
+.Dd September 1, 2025
 .Dt DATE 1
 .Os
 .Sh NAME
@@ -128,7 +128,7 @@ format.
 Parsing is done using
 .Xr strptime 3 .
 .It Fl I Ns Op Ar FMT
-Use
+Use extended
 .St -iso8601
 output format.
 .Ar FMT
@@ -151,9 +151,9 @@ is
 .Cm minutes
 or
 .Cm seconds ) ,
-the
+the extended
 .St -iso8601
-format includes the timezone.
+format includes the timezone offset.
 .It Fl j
 Do not try to set the date.
 This allows you to use the