From b41d591cded43ed1f0ecdf7565236521ac6c109d Mon Sep 17 00:00:00 2001
From: vishakha1411 <vishakha4441@gmail.com>
Date: Mon, 6 Apr 2026 08:06:10 +0530
Subject: [PATCH] date: fix %#P case-swap on lowercase am/pm

---
 src/uu/date/src/format_modifiers.rs | 5 ++++-
 tests/by-util/test_date.rs          | 1 -
 2 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/src/uu/date/src/format_modifiers.rs b/src/uu/date/src/format_modifiers.rs
index 8c18c3cca..8fffaf1ce 100644
--- a/src/uu/date/src/format_modifiers.rs
+++ b/src/uu/date/src/format_modifiers.rs
@@ -337,7 +337,10 @@ fn apply_modifiers(
             .all(|c| !c.is_alphabetic() || c.is_uppercase())
         {
             result = result.to_lowercase();
-        } else {
+        } else if !result
+            .chars()
+            .all(|c| !c.is_alphabetic() || c.is_lowercase())
+        {
             result = result.to_uppercase();
         }
     }
diff --git a/tests/by-util/test_date.rs b/tests/by-util/test_date.rs
index de347a17d..919a096d0 100644
--- a/tests/by-util/test_date.rs
+++ b/tests/by-util/test_date.rs
@@ -1888,7 +1888,6 @@ fn test_date_input_trailing_tz_abbrev_rezones() {
 }
 
 #[test]
-#[ignore = "https://github.com/uutils/coreutils/issues/11659 — GNU date treats the `#` case-swap flag as no-op on `%P` (already-lowercase alt); uutils uppercases it to `PM`."]
 fn test_date_strftime_case_flag_on_alt_ampm() {
     // `%P` is GNU's lowercase am/pm. `%#P` should stay lowercase in GNU; uutils flips to `PM`.
     new_ucmd!()