diff --git a/.clang-format b/.clang-format
new file mode 100644
index 0000000..444c17f
--- /dev/null
+++ b/.clang-format
@@ -0,0 +1,9 @@
+---
+BasedOnStyle: Google
+IndentWidth: 4
+ColumnLimit: 100
+---
+Language: Cpp
+SortIncludes: false
+TabWidth: 4
+UseTab: Never
diff --git a/.github/workflows/rust.yml b/.github/workflows/rust.yml
index 2187697..86eb995 100644
--- a/.github/workflows/rust.yml
+++ b/.github/workflows/rust.yml
@@ -212,6 +212,21 @@ jobs:
       - run: cargo check --all-targets
       - run: cargo clippy --all-targets -- -D warnings
 
+  no-docker-image-check-only:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+      - name: Install Rust
+        id: actions-rs
+        uses: actions-rs/toolchain@v1
+        with:
+          profile: minimal
+          toolchain: nightly
+          override: true
+          components: rust-src
+      - run: cargo +nightly check --target x86_64-unknown-haiku -Z build-std --examples
+
   doc:
     runs-on: ubuntu-latest
     steps:
@@ -253,3 +268,21 @@ jobs:
       - run: if cargo build --lib --target x86_64-fortanix-unknown-sgx; then exit 1; fi
       # Should succeed:
       - run: cargo build --lib --target x86_64-fortanix-unknown-sgx --features fallback
+
+  c:
+    name: Lint and format C
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v3
+
+      - name: Setup Node.js runtime
+        uses: actions/setup-node@v3
+        with:
+          node-version: 16
+
+      - name: Install npm
+        run: npm i -f -g npm@8.16.0
+
+      - name: Lint and check formatting with clang-format
+        run: npx github:artichoke/clang-format --check
diff --git a/Cargo.toml b/Cargo.toml
index 1e0b8ac..8f82fd8 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -24,8 +24,15 @@ core-foundation-sys = "0.8.3"
 winapi = { version = "0.3.9", features = ["activation", "combaseapi", "objbase", "roapi", "winerror", "winstring"] }
 
 [target.'cfg(target_arch = "wasm32")'.dependencies]
-js-sys = "0.3.46"
+js-sys = "0.3.50"
 wasm-bindgen = "0.2.70"
 
 [target.'cfg(target_arch = "wasm32")'.dev-dependencies]
 wasm-bindgen-test = "0.3"
+
+[target.'cfg(target_os = "haiku")'.dependencies]
+iana-time-zone-haiku = { version = "0.1.0", path = "haiku" }
+
+[workspace]
+members = [".", "haiku"]
+default-members = ["."]
diff --git a/haiku/Cargo.toml b/haiku/Cargo.toml
new file mode 100644
index 0000000..0340bd5
--- /dev/null
+++ b/haiku/Cargo.toml
@@ -0,0 +1,15 @@
+[package]
+name = "iana-time-zone-haiku"
+description = "iana-time-zone support crate for Haiku OS"
+version = "0.1.0"
+authors = ["René Kijewski <crates.io@k6i.de>"]
+repository = "https://github.com/strawlab/iana-time-zone"
+license = "MIT OR Apache-2.0"
+readme = "README.md"
+edition = "2018"
+
+[dependencies]
+cxx = "1.0.34"
+
+[build-dependencies]
+cxx-build = "1.0.34"
diff --git a/haiku/LICENSE-APACHE b/haiku/LICENSE-APACHE
new file mode 120000
index 0000000..965b606
--- /dev/null
+++ b/haiku/LICENSE-APACHE
@@ -0,0 +1 @@
+../LICENSE-APACHE
\ No newline at end of file
diff --git a/haiku/LICENSE-MIT b/haiku/LICENSE-MIT
new file mode 120000
index 0000000..76219eb
--- /dev/null
+++ b/haiku/LICENSE-MIT
@@ -0,0 +1 @@
+../LICENSE-MIT
\ No newline at end of file
diff --git a/haiku/README.md b/haiku/README.md
new file mode 100644
index 0000000..7ad49ae
--- /dev/null
+++ b/haiku/README.md
@@ -0,0 +1,8 @@
+# iana-time-zone-haiku
+
+[![Crates.io](https://img.shields.io/crates/v/iana-time-zone-haiku.svg)](https://crates.io/crates/iana-time-zone-haiku)
+[![Documentation](https://docs.rs/iana-time-zone/badge.svg)](https://docs.rs/iana-time-zone/)
+[![Crate License](https://img.shields.io/crates/l/iana-time-zone-haiku.svg)](https://crates.io/crates/iana-time-zone-haiku)
+[![build](https://github.com/strawlab/iana-time-zone/workflows/build/badge.svg?branch=master)](https://github.com/strawlab/iana-time-zone/actions?query=branch%3Amaster)
+
+[iana-time-zone](https://github.com/strawlab/iana-time-zone) support crate for Haiku OS.
diff --git a/haiku/build.rs b/haiku/build.rs
new file mode 100644
index 0000000..bb015ba
--- /dev/null
+++ b/haiku/build.rs
@@ -0,0 +1,11 @@
+fn main() {
+    cxx_build::bridge("src/lib.rs")
+        .file("src/implementation.cc")
+        .flag_if_supported("-std=c++11")
+        .compile("tz_haiku");
+
+    println!("cargo:return-if-changed=include/interface.h");
+    println!("cargo:return-if-changed=src/implementation.cc");
+    println!("cargo:return-if-changed=src/lib.rs");
+    println!("cargo:rustc-link-lib=be");
+}
diff --git a/haiku/src/implementation.cc b/haiku/src/implementation.cc
new file mode 100644
index 0000000..282a423
--- /dev/null
+++ b/haiku/src/implementation.cc
@@ -0,0 +1,62 @@
+#include "iana-time-zone-haiku/src/interface.h"
+#include "iana-time-zone-haiku/src/lib.rs.h"
+
+#ifdef __HAIKU__
+
+#include <cstring>
+
+#include <Errors.h>
+#include <LocaleRoster.h>
+#include <String.h>
+#include <TimeZone.h>
+
+size_t ::iana_time_zone_haiku::get_tz(rust::Slice<uint8_t> buf) {
+    try {
+        static_assert(sizeof(char) == sizeof(uint8_t), "Illegal char size");
+
+        if (buf.empty()) {
+            return 0;
+        }
+
+        // `BLocaleRoster::Default()` returns a reference to a statically allocated object.
+        // https://github.com/haiku/haiku/blob/8f16317/src/kits/locale/LocaleRoster.cpp#L143-L147
+        BLocaleRoster *locale_roster(BLocaleRoster::Default());
+        if (!locale_roster) {
+            return 0;
+        }
+
+        BTimeZone tz(NULL, NULL);
+        if (locale_roster->GetDefaultTimeZone(&tz) != B_OK) {
+            return 0;
+        }
+
+        BString bname(tz.ID());
+        int32_t ilength(bname.Length());
+        if (ilength <= 0) {
+            return 0;
+        }
+
+        size_t length(ilength);
+        if (length > buf.size()) {
+            return 0;
+        }
+
+        // BString::String() returns a borrowed string.
+        // https://www.haiku-os.org/docs/api/classBString.html#ae4fe78b06c8e3310093b80305e14ba87
+        const char *sname(bname.String());
+        if (!sname) {
+            return 0;
+        }
+
+        std::memcpy(buf.data(), sname, length);
+        return length;
+    } catch (...) {
+        return 0;
+    }
+}
+
+#else
+
+size_t ::iana_time_zone_haiku::get_tz(rust::Slice<uint8_t>) { return 0; }
+
+#endif
diff --git a/haiku/src/interface.h b/haiku/src/interface.h
new file mode 100644
index 0000000..5913a40
--- /dev/null
+++ b/haiku/src/interface.h
@@ -0,0 +1,9 @@
+#pragma once
+
+#include "rust/cxx.h"
+
+#include <cstddef>
+
+namespace iana_time_zone_haiku {
+size_t get_tz(rust::Slice<uint8_t> buf);
+}
diff --git a/haiku/src/lib.rs b/haiku/src/lib.rs
new file mode 100644
index 0000000..e0be5cd
--- /dev/null
+++ b/haiku/src/lib.rs
@@ -0,0 +1,29 @@
+/// # iana-time-zone-haiku
+///
+/// [![Crates.io](https://img.shields.io/crates/v/iana-time-zone-haiku.svg)](https://crates.io/crates/iana-time-zone-haiku)
+/// [![Documentation](https://docs.rs/iana-time-zone/badge.svg)](https://docs.rs/iana-time-zone/)
+/// [![Crate License](https://img.shields.io/crates/l/iana-time-zone-haiku-haiku.svg)](https://crates.io/crates/iana-time-zone-haiku)
+/// [![build](https://github.com/strawlab/iana-time-zone/workflows/build/badge.svg?branch=master)](https://github.com/strawlab/iana-time-zone/actions?query=branch%3Amaster)
+///
+/// [iana-time-zone](https://github.com/strawlab/iana-time-zone) support crate for Haiku OS.
+
+#[cxx::bridge(namespace = "iana_time_zone_haiku")]
+mod ffi {
+    // SAFETY: in here "unsafe" is simply part of the syntax
+    unsafe extern "C++" {
+        include!("iana-time-zone-haiku/src/interface.h");
+
+        fn get_tz(buf: &mut [u8]) -> usize;
+    }
+}
+
+pub fn get_timezone() -> Option<String> {
+    // The longest name in the IANA time zone database is 25 ASCII characters long.
+    let mut buf = [0u8; 32];
+    let len = ffi::get_tz(&mut buf);
+    // The name should not be empty, or excessively long.
+    match buf.get(..len)? {
+        b"" => None,
+        s => Some(std::str::from_utf8(s).ok()?.to_owned()),
+    }
+}
diff --git a/src/lib.rs b/src/lib.rs
index ffff3a7..df5fa9d 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -38,6 +38,7 @@
     path = "tz_illumos.rs"
 )]
 #[cfg_attr(target_os = "android", path = "tz_android.rs")]
+#[cfg_attr(target_os = "haiku", path = "tz_haiku.rs")]
 mod platform;
 
 /// Error types
diff --git a/src/platform.rs b/src/platform.rs
index 82b7f17..5992bf3 100644
--- a/src/platform.rs
+++ b/src/platform.rs
@@ -5,5 +5,5 @@ pub fn get_timezone_inner() -> std::result::Result<String, crate::GetTimezoneErr
 #[cfg(not(feature = "fallback"))]
 compile_error!(
     "iana-time-zone is currently implemented for Linux, Window, MacOS, FreeBSD, NetBSD, \
-    OpenBSD, Dragonfly, WebAssembly (browser), iOS, Illumos, Android, and Solaris.",
+    OpenBSD, Dragonfly, WebAssembly (browser), iOS, Illumos, Android, Solaris and Haiku.",
 );
diff --git a/src/tz_haiku.rs b/src/tz_haiku.rs
new file mode 100644
index 0000000..d78372b
--- /dev/null
+++ b/src/tz_haiku.rs
@@ -0,0 +1,3 @@
+pub(crate) fn get_timezone_inner() -> Result<String, crate::GetTimezoneError> {
+    iana_time_zone_haiku::get_timezone().ok_or(crate::GetTimezoneError::OsError)
+}