diff --git a/metrics/aocih.sh b/metrics/aocih.sh
new file mode 100755
index 00000000..6a4d1a5a
--- /dev/null
+++ b/metrics/aocih.sh
@@ -0,0 +1,42 @@
+#!/usr/bin/env bash
+# The MIT License (MIT)
+#
+# Copyright (c) 2021-2024 Yegor Bugayenko
+#
+# Permission is hereby granted, free of charge, to any person obtaining a copy
+# of this software and associated documentation files (the "Software"), to deal
+# in the Software without restriction, including without limitation the rights
+# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+# copies of the Software, and to permit persons to whom the Software is
+# furnished to do so, subject to the following conditions:
+#
+# The above copyright notice and this permission notice shall be included
+# in all copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE
+# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+# SOFTWARE.
+
+set -e
+set -o pipefail
+
+java_file=$(realpath "$1")
+output=$(realpath "$2")
+
+age_in_hours=0
+cd "$(dirname "${java_file}")"
+
+if git status > /dev/null 2>&1; then
+    repo_first_commit=$(git log --reverse --format=%at | head -1)
+    file_first_commit=$(git log --diff-filter=A --format=%at -- "$java_file" | tail -1)
+    if [[ -n "$file_first_commit" ]]; then
+        age_in_seconds=$((file_first_commit - repo_first_commit))
+        age_in_hours=$((age_in_seconds / 3600))
+    fi
+fi
+
+echo "AoCiH $age_in_hours Age of Class in Hours" > "$output"
diff --git a/tests/metrics/test-aocih.sh b/tests/metrics/test-aocih.sh
new file mode 100755
index 00000000..1e3a5b7a
--- /dev/null
+++ b/tests/metrics/test-aocih.sh
@@ -0,0 +1,54 @@
+#!/usr/bin/env bash
+# The MIT License (MIT)
+#
+# Copyright (c) 2021-2024 Yegor Bugayenko
+#
+# Permission is hereby granted, free of charge, to any person obtaining a copy
+# of this software and associated documentation files (the "Software"), to deal
+# in the Software without restriction, including without limitation the rights
+# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+# copies of the Software, and to permit persons to whom the Software is
+# furnished to do so, subject to the following conditions:
+#
+# The above copyright notice and this permission notice shall be included
+# in all copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE
+# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+# SOFTWARE.
+set -e
+set -o pipefail
+
+temp=$1
+stdout=$2
+
+{
+    tmp=$(mktemp -d /tmp/XXXX)
+    "${LOCAL}/metrics/aocih.sh" "${tmp}/Test.java" "${temp}/stdout"
+    grep -q "AoCiH 0 " "${temp}/stdout"
+} > "${stdout}" 2>&1
+echo "👍🏻 Didn't fail in non-git directory"
+
+{
+    mkdir -p "${temp}/foo"
+    cd "${temp}/foo"
+    git init --quiet .
+    git config user.email 'foo@example.com'
+    git config user.name 'Foo'
+    git config commit.gpgsign false
+    touch empty.file
+    git add "empty.file"
+    git commit --quiet -am "Initial commit"
+    java="Test.java"
+    echo "class Foo {}" > "${java}"
+    git add "${java}"
+    git commit --quiet -am "Second commit"
+    git commit --amend --no-edit --date="$(date -d "+1 hour" --rfc-2822)"
+    "${LOCAL}/metrics/aocih.sh" "${java}" stdout
+    grep -qP "AoCiH 1" stdout
+} > "${stdout}" 2>&1
+echo "👍🏻 Correctly calculated AoCiH in the repository"
\ No newline at end of file