On 14/12/2025 20:47, Collin Funk wrote:
On a GNU/Linux system, we have the following:

     $ LC_ALL=en_US.UTF-8 date -u -d 1:00
     Sun Dec 14 01:00:00 AM UTC 2025
     $ LC_ALL=en_US.UTF-8 locale date_fmt
     %a %b %e %r %Z %Y
     $ LC_ALL=en_US.UTF-8 locale t_fmt_ampm
     %I:%M:%S %p

     $ LC_ALL=nl_NL.UTF-8 date -u -d 1:00
     zo 14 dec 2025  1:00:00 UTC
     $ LC_ALL=nl_NL.UTF-8 locale date_fmt
     %a %e %b %Y %k:%M:%S %Z

We respect the locales preference for a leading zero or leading space in
single digit hours.

* tests/date/date-locale-hour.sh: Check that the locales preference for
leading zeros or spaces in single digit hours is used.
---
  tests/date/date-locale-hour.sh | 17 +++++++++++++++++
  1 file changed, 17 insertions(+)

diff --git a/tests/date/date-locale-hour.sh b/tests/date/date-locale-hour.sh
index 7e0d12019..1f44bc3eb 100755
--- a/tests/date/date-locale-hour.sh
+++ b/tests/date/date-locale-hour.sh
@@ -34,6 +34,23 @@ for loc in "$LOCALE_FR_UTF8" 'en_US.UTF-8'; do
      *"$compare_time"*) ;;
      *) fail=1 ;;
    esac
+
+  # The use of %r requires checking 'locale t_fmt_ampm' for the format.
+  fmt=$(LC_ALL="$loc" locale date_fmt)
+  case "$fmt" in
+    *%r*) fmt=$(LC_ALL="$loc" locale t_fmt_ampm) ;;

Maybe also:
  +    *%X*) fmt=$(LC_ALL="$loc" locale t_fmt) ;;

+  esac
+
+  case "$fmt" in
+    *%[IHRT]*)  compare_time='01:00' ;;

Maybe also:
  +    *%_[IH]*)  compare_time=' 1:00' ;;

+    *%[lk]*)    compare_time=' 1:00' ;;
+    *) skip_ 'unrecognised locale hour format';;
+  esac
+
+  case $(LC_ALL="$loc" date -d '2025-10-11T01:00') in
+    *"$compare_time"*) ;;
+    *) fail=1 ;;
+  esac
  done

cheers,
Padraig

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