diff --git a/Cargo.lock b/Cargo.lock
index 427a8166c..ab9d8d50b 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -314,27 +314,6 @@ dependencies = [
  "windows-link",
 ]
 
-[[package]]
-name = "chrono-tz"
-version = "0.10.3"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "efdce149c370f133a071ca8ef6ea340b7b88748ab0810097a9e2976eaa34b4f3"
-dependencies = [
- "chrono",
- "chrono-tz-build",
- "phf",
-]
-
-[[package]]
-name = "chrono-tz-build"
-version = "0.4.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e94fea34d77a245229e7746bd2beb786cd2a896f306ff491fb8cecb3074b10a7"
-dependencies = [
- "parse-zoneinfo",
- "phf_codegen",
-]
-
 [[package]]
 name = "clang-sys"
 version = "1.8.1"
@@ -1798,15 +1777,6 @@ dependencies = [
  "windows-targets 0.52.6",
 ]
 
-[[package]]
-name = "parse-zoneinfo"
-version = "0.3.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1f2a05b18d44e2957b88f96ba460715e295bc1d7510468a2f3d3b44535d26c24"
-dependencies = [
- "regex",
-]
-
 [[package]]
 name = "parse_datetime"
 version = "0.9.0"
@@ -3738,7 +3708,6 @@ dependencies = [
  "blake2b_simd",
  "blake3",
  "chrono",
- "chrono-tz",
  "clap",
  "crc32fast",
  "data-encoding",
@@ -3750,7 +3719,6 @@ dependencies = [
  "fluent-bundle",
  "glob",
  "hex",
- "iana-time-zone",
  "itertools 0.14.0",
  "libc",
  "md-5",
diff --git a/Cargo.toml b/Cargo.toml
index 44dda8c7d..046f1c6ca 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -282,7 +282,6 @@ chrono = { version = "0.4.41", default-features = false, features = [
   "alloc",
   "clock",
 ] }
-chrono-tz = "0.10.0"
 clap = { version = "4.5", features = ["wrap_help", "cargo"] }
 clap_complete = "4.4"
 clap_mangen = "0.2"
@@ -301,7 +300,6 @@ gcd = "2.3"
 glob = "0.3.1"
 half = "2.4.1"
 hostname = "0.4"
-iana-time-zone = "0.1.57"
 indicatif = "0.17.8"
 itertools = "0.14.0"
 jiff = { version = "0.2.10", default-features = false, features = [
diff --git a/fuzz/Cargo.lock b/fuzz/Cargo.lock
index f7d500c6a..cd9aae5a4 100644
--- a/fuzz/Cargo.lock
+++ b/fuzz/Cargo.lock
@@ -219,27 +219,6 @@ dependencies = [
  "windows-link",
 ]
 
-[[package]]
-name = "chrono-tz"
-version = "0.10.3"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "efdce149c370f133a071ca8ef6ea340b7b88748ab0810097a9e2976eaa34b4f3"
-dependencies = [
- "chrono",
- "chrono-tz-build",
- "phf",
-]
-
-[[package]]
-name = "chrono-tz-build"
-version = "0.4.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8f10f8c9340e31fc120ff885fcdb54a0b48e474bbd77cab557f0c30a3e569402"
-dependencies = [
- "parse-zoneinfo",
- "phf_codegen",
-]
-
 [[package]]
 name = "clap"
 version = "4.5.38"
@@ -872,15 +851,6 @@ dependencies = [
  "unicode-width",
 ]
 
-[[package]]
-name = "parse-zoneinfo"
-version = "0.3.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1f2a05b18d44e2957b88f96ba460715e295bc1d7510468a2f3d3b44535d26c24"
-dependencies = [
- "regex",
-]
-
 [[package]]
 name = "parse_datetime"
 version = "0.9.0"
@@ -892,44 +862,6 @@ dependencies = [
  "regex",
 ]
 
-[[package]]
-name = "phf"
-version = "0.11.3"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1fd6780a80ae0c52cc120a26a1a42c1ae51b247a253e4e06113d23d2c2edd078"
-dependencies = [
- "phf_shared",
-]
-
-[[package]]
-name = "phf_codegen"
-version = "0.11.3"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "aef8048c789fa5e851558d709946d6d79a8ff88c0440c587967f8e94bfb1216a"
-dependencies = [
- "phf_generator",
- "phf_shared",
-]
-
-[[package]]
-name = "phf_generator"
-version = "0.11.3"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3c80231409c20246a13fddb31776fb942c38553c51e871f8cbd687a4cfb5843d"
-dependencies = [
- "phf_shared",
- "rand 0.8.5",
-]
-
-[[package]]
-name = "phf_shared"
-version = "0.11.3"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "67eabc2ef2a60eb7faa00097bd1ffdb5bd28e62bf39990626a582201b7a754e5"
-dependencies = [
- "siphasher",
-]
-
 [[package]]
 name = "pkg-config"
 version = "0.3.32"
@@ -984,15 +916,6 @@ version = "5.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "74765f6d916ee2faa39bc8e68e4f3ed8949b48cccdac59983d287a7cb71ce9c5"
 
-[[package]]
-name = "rand"
-version = "0.8.5"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "34af8d1a0e25924bc5b7c43c079c942339d8f0a8b57c39049bef581b46327404"
-dependencies = [
- "rand_core 0.6.4",
-]
-
 [[package]]
 name = "rand"
 version = "0.9.1"
@@ -1000,7 +923,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "9fbfd9d094a40bf3ae768db9361049ace4c0e04a4fd6b359518bd7b73a73dd97"
 dependencies = [
  "rand_chacha",
- "rand_core 0.9.3",
+ "rand_core",
 ]
 
 [[package]]
@@ -1010,15 +933,9 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d3022b5f1df60f26e1ffddd6c66e8aa15de382ae63b3a0c1bfc0e4d3e3f325cb"
 dependencies = [
  "ppv-lite86",
- "rand_core 0.9.3",
+ "rand_core",
 ]
 
-[[package]]
-name = "rand_core"
-version = "0.6.4"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ec0be4795e2f6a28069bec0b5ff3e2ac9bafc99e6a9a7dc3547996c5c816922c"
-
 [[package]]
 name = "rand_core"
 version = "0.9.3"
@@ -1189,12 +1106,6 @@ version = "2.7.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "bbbb5d9659141646ae647b42fe094daf6c6192d1620870b449d9557f748b2daa"
 
-[[package]]
-name = "siphasher"
-version = "1.0.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "56199f7ddabf13fe5074ce809e7d3f42b42ae711800501b5b16ea82ad029c39d"
-
 [[package]]
 name = "sm3"
 version = "0.4.2"
@@ -1442,7 +1353,7 @@ dependencies = [
  "itertools",
  "memchr",
  "nix",
- "rand 0.9.1",
+ "rand",
  "rayon",
  "self_cell",
  "tempfile",
@@ -1499,8 +1410,6 @@ dependencies = [
  "bigdecimal",
  "blake2b_simd",
  "blake3",
- "chrono",
- "chrono-tz",
  "clap",
  "crc32fast",
  "data-encoding",
@@ -1511,7 +1420,6 @@ dependencies = [
  "fluent-bundle",
  "glob",
  "hex",
- "iana-time-zone",
  "itertools",
  "libc",
  "md-5",
@@ -1538,7 +1446,7 @@ name = "uucore-fuzz"
 version = "0.0.0"
 dependencies = [
  "libfuzzer-sys",
- "rand 0.9.1",
+ "rand",
  "uu_cksum",
  "uu_cut",
  "uu_date",
@@ -1571,7 +1479,7 @@ version = "0.1.0"
 dependencies = [
  "console",
  "libc",
- "rand 0.9.1",
+ "rand",
  "similar",
  "tempfile",
  "uucore",
diff --git a/src/uu/date/Cargo.toml b/src/uu/date/Cargo.toml
index f498befc7..af1e87fb4 100644
--- a/src/uu/date/Cargo.toml
+++ b/src/uu/date/Cargo.toml
@@ -26,7 +26,7 @@ jiff = { workspace = true, features = [
   "tzdb-zoneinfo",
   "tzdb-concatenated",
 ] }
-uucore = { workspace = true, features = ["custom-tz-fmt", "parser"] }
+uucore = { workspace = true, features = ["parser"] }
 parse_datetime = { workspace = true }
 
 [target.'cfg(unix)'.dependencies]
diff --git a/src/uu/ls/Cargo.toml b/src/uu/ls/Cargo.toml
index 83a2f4fa5..ffb90a940 100644
--- a/src/uu/ls/Cargo.toml
+++ b/src/uu/ls/Cargo.toml
@@ -37,7 +37,6 @@ terminal_size = { workspace = true }
 thiserror = { workspace = true }
 uucore = { workspace = true, features = [
   "colors",
-  "custom-tz-fmt",
   "entries",
   "format",
   "fs",
diff --git a/src/uucore/Cargo.toml b/src/uucore/Cargo.toml
index be2db18e5..7395df343 100644
--- a/src/uucore/Cargo.toml
+++ b/src/uucore/Cargo.toml
@@ -21,7 +21,6 @@ path = "src/lib/lib.rs"
 
 [dependencies]
 chrono = { workspace = true, optional = true }
-chrono-tz = { workspace = true, optional = true }
 clap = { workspace = true }
 uucore_procs = { workspace = true }
 number_prefix = { workspace = true }
@@ -29,7 +28,6 @@ dns-lookup = { workspace = true, optional = true }
 dunce = { version = "1.0.4", optional = true }
 wild = "2.2.1"
 glob = { workspace = true, optional = true }
-iana-time-zone = { workspace = true, optional = true }
 itertools = { workspace = true, optional = true }
 time = { workspace = true, optional = true, features = [
   "formatting",
@@ -138,6 +136,5 @@ utf8 = []
 utmpx = ["time", "time/macros", "libc", "dns-lookup"]
 version-cmp = []
 wide = []
-custom-tz-fmt = ["chrono", "chrono-tz", "iana-time-zone"]
 tty = []
 uptime = ["chrono", "libc", "windows-sys", "utmpx", "utmp-classic"]
diff --git a/src/uucore/src/lib/features.rs b/src/uucore/src/lib/features.rs
index 257043e00..44db53071 100644
--- a/src/uucore/src/lib/features.rs
+++ b/src/uucore/src/lib/features.rs
@@ -14,8 +14,6 @@ pub mod buf_copy;
 pub mod checksum;
 #[cfg(feature = "colors")]
 pub mod colors;
-#[cfg(feature = "custom-tz-fmt")]
-pub mod custom_tz_fmt;
 #[cfg(feature = "encoding")]
 pub mod encoding;
 #[cfg(feature = "extendedbigdecimal")]
diff --git a/src/uucore/src/lib/features/custom_tz_fmt.rs b/src/uucore/src/lib/features/custom_tz_fmt.rs
deleted file mode 100644
index 0d2b6aebe..000000000
--- a/src/uucore/src/lib/features/custom_tz_fmt.rs
+++ /dev/null
@@ -1,60 +0,0 @@
-// This file is part of the uutils coreutils package.
-//
-// For the full copyright and license information, please view the LICENSE
-// file that was distributed with this source code.
-
-use chrono::{TimeZone, Utc};
-use chrono_tz::{OffsetName, Tz};
-use iana_time_zone::get_timezone;
-
-/// Get the alphabetic abbreviation of the current timezone.
-///
-/// For example, "UTC" or "CET" or "PDT"
-fn timezone_abbreviation() -> String {
-    let tz = match std::env::var("TZ") {
-        // TODO Support other time zones...
-        Ok(s) if s == "UTC0" || s.is_empty() => Tz::Etc__UTC,
-        _ => match get_timezone() {
-            Ok(tz_str) => tz_str.parse().unwrap(),
-            Err(_) => Tz::Etc__UTC,
-        },
-    };
-
-    let offset = tz.offset_from_utc_date(&Utc::now().date_naive());
-    offset.abbreviation().unwrap_or("UTC").to_string()
-}
-
-/// Adapt the given string to be accepted by the chrono library crate.
-///
-/// # Arguments
-///
-/// fmt: the format of the string
-///
-/// # Return
-///
-/// A string that can be used as parameter of the chrono functions that use formats
-pub fn custom_time_format(fmt: &str) -> String {
-    // TODO - Revisit when chrono 0.5 is released. https://github.com/chronotope/chrono/issues/970
-    // chrono crashes on %#z, but it's the same as %z anyway.
-    // GNU `date` uses `%N` for nano seconds, however the `chrono` crate uses `%f`.
-    fmt.replace("%#z", "%z")
-        .replace("%N", "%f")
-        .replace("%Z", timezone_abbreviation().as_ref())
-}
-
-#[cfg(test)]
-mod tests {
-    use super::{custom_time_format, timezone_abbreviation};
-
-    #[test]
-    fn test_custom_time_format() {
-        assert_eq!(custom_time_format("%Y-%m-%d %H-%M-%S"), "%Y-%m-%d %H-%M-%S");
-        assert_eq!(custom_time_format("%d-%m-%Y %H-%M-%S"), "%d-%m-%Y %H-%M-%S");
-        assert_eq!(custom_time_format("%Y-%m-%d %H-%M-%S"), "%Y-%m-%d %H-%M-%S");
-        assert_eq!(
-            custom_time_format("%Y-%m-%d %H-%M-%S.%N"),
-            "%Y-%m-%d %H-%M-%S.%f"
-        );
-        assert_eq!(custom_time_format("%Z"), timezone_abbreviation());
-    }
-}
diff --git a/src/uucore/src/lib/lib.rs b/src/uucore/src/lib/lib.rs
index b1a9363f7..8dc49cadd 100644
--- a/src/uucore/src/lib/lib.rs
+++ b/src/uucore/src/lib/lib.rs
@@ -41,8 +41,6 @@ pub use crate::features::buf_copy;
 pub use crate::features::checksum;
 #[cfg(feature = "colors")]
 pub use crate::features::colors;
-#[cfg(feature = "custom-tz-fmt")]
-pub use crate::features::custom_tz_fmt;
 #[cfg(feature = "encoding")]
 pub use crate::features::encoding;
 #[cfg(feature = "extendedbigdecimal")]