diff --git a/src/uu/date/src/date.rs b/src/uu/date/src/date.rs
index d2100fc80..45bceaec3 100644
--- a/src/uu/date/src/date.rs
+++ b/src/uu/date/src/date.rs
@@ -487,6 +487,7 @@ pub fn uu_app() -> Command {
                 .short('s')
                 .long(OPT_SET)
                 .value_name("STRING")
+                .allow_hyphen_values(true)
                 .help({
                     #[cfg(not(any(target_os = "macos", target_os = "redox")))]
                     {
diff --git a/src/uu/kill/src/kill.rs b/src/uu/kill/src/kill.rs
index 809d59b7d..94aa81964 100644
--- a/src/uu/kill/src/kill.rs
+++ b/src/uu/kill/src/kill.rs
@@ -137,8 +137,8 @@ pub fn uu_app() -> Command {
 }
 
 fn handle_obsolete(args: &mut Vec<String>) -> Option<usize> {
-    // Sanity check
-    if args.len() > 2 {
+    // Sanity check - need at least the program name and one argument
+    if args.len() >= 2 {
         // Old signal can only be in the first argument position
         let slice = args[1].as_str();
         if let Some(signal) = slice.strip_prefix('-') {
diff --git a/src/uucore/src/lib/features/format/spec.rs b/src/uucore/src/lib/features/format/spec.rs
index 467f09850..3bef0fbb1 100644
--- a/src/uucore/src/lib/features/format/spec.rs
+++ b/src/uucore/src/lib/features/format/spec.rs
@@ -595,14 +595,10 @@ fn eat_number(rest: &mut &[u8], index: &mut usize) -> Option<usize> {
     match rest[*index..].iter().position(|b| !b.is_ascii_digit()) {
         None | Some(0) => None,
         Some(i) => {
-            // TODO: This might need to handle errors better
-            // For example in case of overflow.
-            let parsed = std::str::from_utf8(&rest[*index..(*index + i)])
-                .unwrap()
-                .parse()
-                .unwrap();
+            // Handle large numbers that would cause overflow
+            let num_str = std::str::from_utf8(&rest[*index..(*index + i)]).unwrap();
             *index += i;
-            Some(parsed)
+            Some(num_str.parse().unwrap_or(usize::MAX))
         }
     }
 }
diff --git a/tests/by-util/test_date.rs b/tests/by-util/test_date.rs
index 9d59efd58..512c5c799 100644
--- a/tests/by-util/test_date.rs
+++ b/tests/by-util/test_date.rs
@@ -293,6 +293,27 @@ fn test_date_set_permissions_error() {
     }
 }
 
+#[test]
+#[cfg(all(unix, not(any(target_os = "android", target_os = "macos"))))]
+fn test_date_set_hyphen_prefixed_values() {
+    // test -s flag accepts hyphen-prefixed values like "-3 days"
+    if !(geteuid() == 0 || uucore::os::is_wsl_1()) {
+        let test_cases = vec!["-1 hour", "-2 days", "-3 weeks", "-1 month"];
+
+        for date_str in test_cases {
+            let result = new_ucmd!().arg("--set").arg(date_str).fails();
+            result.no_stdout();
+            // permission error, not argument parsing error
+            assert!(
+                result.stderr_str().starts_with("date: cannot set date: "),
+                "Expected permission error for '{}', but got: {}",
+                date_str,
+                result.stderr_str()
+            );
+        }
+    }
+}
+
 #[test]
 #[cfg(target_os = "macos")]
 fn test_date_set_mac_unavailable() {
diff --git a/tests/by-util/test_kill.rs b/tests/by-util/test_kill.rs
index 5fb8fb312..aad1982d6 100644
--- a/tests/by-util/test_kill.rs
+++ b/tests/by-util/test_kill.rs
@@ -395,3 +395,27 @@ fn test_kill_with_signal_and_table() {
         .arg("-t")
         .fails();
 }
+
+/// Test that `kill -1` (signal without PID) reports "no process ID" error
+/// instead of being misinterpreted as pid=-1 which would kill all processes.
+/// This matches GNU kill behavior.
+#[test]
+fn test_kill_signal_only_no_pid() {
+    // Test with -1 (SIGHUP)
+    new_ucmd!()
+        .arg("-1")
+        .fails()
+        .stderr_contains("no process ID specified");
+
+    // Test with -9 (SIGKILL)
+    new_ucmd!()
+        .arg("-9")
+        .fails()
+        .stderr_contains("no process ID specified");
+
+    // Test with -TERM
+    new_ucmd!()
+        .arg("-TERM")
+        .fails()
+        .stderr_contains("no process ID specified");
+}
diff --git a/tests/by-util/test_printf.rs b/tests/by-util/test_printf.rs
index 6bfcecbb4..21e638f7c 100644
--- a/tests/by-util/test_printf.rs
+++ b/tests/by-util/test_printf.rs
@@ -1482,3 +1482,13 @@ fn test_large_width_format() {
             .stdout_is("");
     }
 }
+
+#[test]
+fn test_extreme_field_width_overflow() {
+    // Test the specific case that was causing panic due to integer overflow
+    // in the field width parsing.
+    new_ucmd!()
+        .args(&["%999999999999999999999999d", "1"])
+        .fails_with_code(1)
+        .stderr_only("printf: write error\n");
+}