diff --git a/hack/check-copyright-year.sh b/hack/check-copyright-year.sh
index 907ebb0f..0870da68 100755
--- a/hack/check-copyright-year.sh
+++ b/hack/check-copyright-year.sh
@@ -1,26 +1,29 @@
 #!/bin/bash
 
-# Copyright 2021 the Pinniped contributors. All Rights Reserved.
+# Copyright 2021-2023 the Pinniped contributors. All Rights Reserved.
 # SPDX-License-Identifier: Apache-2.0
-#
-# Check if copyright statements include the current year
-#
+
+set -euo pipefail
+
 files=$(git diff --cached --name-only)
 year=$(date +"%Y")
 
-for f in $files; do
-    head -10 $f | grep -i copyright 2>&1 1>/dev/null || continue
+missing_copyright_files=()
 
-    if ! grep -i -e "copyright.*$year" $f 2>&1 1>/dev/null; then
-        missing_copyright_files="$missing_copyright_files $f"
+for f in $files; do
+    head -10 "$f" | grep -i 'Copyright.*the Pinniped contributors' 2>&1 1>/dev/null || continue
+
+    if ! head -10 "$f" | grep -i -e "Copyright.*$year.*the Pinniped contributors" 2>&1 1>/dev/null; then
+        missing_copyright_files+=("$f")
     fi
 done
 
-if [ -n "$missing_copyright_files" ]; then
+if [[ "${#missing_copyright_files[@]}" -gt "0" ]]; then
     echo "Copyright notice should include the year the file was created and the year the file was last modified."
     echo "$year is missing in the copyright notice of the following files:"
-    for f in $missing_copyright_files; do
+    for f in "${missing_copyright_files[@]}"; do
         echo "    $f"
     done
+    echo "Try using hack/update-copyright-year.sh to update the copyright automatically in staged files."
     exit 1
 fi
diff --git a/hack/update-copyright-year.sh b/hack/update-copyright-year.sh
new file mode 100755
index 00000000..682701b1
--- /dev/null
+++ b/hack/update-copyright-year.sh
@@ -0,0 +1,39 @@
+#!/bin/bash
+
+# Copyright 2021-2023 the Pinniped contributors. All Rights Reserved.
+# SPDX-License-Identifier: Apache-2.0
+
+set -euo pipefail
+
+if [[ "$OSTYPE" != "darwin"* ]]; then
+  echo "This script was only written for MacOS (due to differences with Linux sed flags)"
+  exit 1
+fi
+
+files=$(git diff --cached --name-only)
+year=$(date +"%Y")
+
+missing_copyright_files=()
+
+for f in $files; do
+    head -10 "$f" | grep -i 'Copyright.*the Pinniped contributors' 2>&1 1>/dev/null || continue
+
+    if ! head -10 "$f" | grep -i -e "Copyright.*$year.*the Pinniped contributors" 2>&1 1>/dev/null; then
+        missing_copyright_files+=("$f")
+    fi
+done
+
+if [[ "${#missing_copyright_files[@]}" -gt "0" ]]; then
+    echo "Fixing copyright notice in the following files:"
+    for f in "${missing_copyright_files[@]}"; do
+        echo "    $f"
+        # The rule when updating copyrights is to always keep the starting year,
+        # and to replace the ending year with the current year.
+        # This uses MacOS sed flags to replace "XXXX-YYYY" with "XXXX-year" in the copyright notice.
+        sed -E -e 's/Copyright ([0-9]{4})-([0-9]{4}) the Pinniped contributors/Copyright \1-2023 the Pinniped contributors/' -i '' "$f"
+        # This uses MacOS sed flags to replace "XXXX" with "XXXX-year" in the copyright notice.
+        sed -E -e 's/Copyright ([0-9]{4}) the Pinniped contributors/Copyright \1-2023 the Pinniped contributors/' -i '' "$f"
+    done
+    echo "Done!"
+    exit 1
+fi