diff --git a/lib/compatible_date.sh b/lib/compatible_date.sh
index 75748b0..e2f0ac3 100755
--- a/lib/compatible_date.sh
+++ b/lib/compatible_date.sh
@@ -37,7 +37,7 @@ date_today () {
 
 	local exit_status=$?
 	if [ $exit_status -ne 0 ]; then
-		echo "ERROR: ${0##*/}:date_today failed to produce date string" >&2
+		echo "ERROR: ${0##*/}:$FUNCNAME failed to produce date string" >&2
 		return $exit_status
 	fi
 
@@ -53,7 +53,7 @@ dateTime_now_locale () {
 
 	local exit_status=$?
 	if [ $exit_status -ne 0 ]; then
-		echo "ERROR: ${0##*/}:dateTime_now_locale failed to produce date string" >&2
+		echo "ERROR: ${0##*/}:$FUNCNAME failed to produce date string" >&2
 		return $exit_status
 	fi
 
@@ -69,7 +69,7 @@ dateTime_now_canonical () {
 
 	local exit_status=$?
 	if [ $exit_status -ne 0 ]; then
-		echo "ERROR: ${0##*/}:dateTime_now_canonical failed to produce date string" >&2
+		echo "ERROR: ${0##*/}:$FUNCNAME failed to produce date string" >&2
 		return $exit_status
 	fi
 
@@ -87,7 +87,7 @@ dateTime_max32_canonical () {
 dateTime_openssl2canonical () {
 	local in_date="$1"
 	if [ -z "${in_date}" ] ; then
-		echo "ERROR: ${0##*/}:dateTime_openssl2canonical requires command-line arg" >&2
+		echo "ERROR: ${0##*/}:$FUNCNAME requires command-line arg" >&2
 		return 1
 	fi
 
@@ -104,7 +104,7 @@ dateTime_openssl2canonical () {
 
 	local exit_status=$?
 	if [ $exit_status -ne 0 ]; then
-		echo "ERROR: ${0##*/}:dateTime_openssl2canonical failed to convert date string ${in_date}" >&2
+		echo "ERROR: ${0##*/}:$FUNCNAME failed to convert date string ${in_date}" >&2
 		return $exit_status
 	fi
 
@@ -116,7 +116,7 @@ dateTime_openssl2canonical () {
 dateTime_apache2canonical () {
 	local in_date="$1"
 	if [ -z "${in_date}" ] ; then
-		echo "ERROR: ${0##*/}:dateTime_openssl2canonical requires command-line arg" >&2
+		echo "ERROR: ${0##*/}:$FUNCNAME requires command-line arg" >&2
 		return 1
 	fi
 
@@ -133,7 +133,7 @@ dateTime_apache2canonical () {
 
 	local exit_status=$?
 	if [ $exit_status -ne 0 ]; then
-		echo "ERROR: ${0##*/}:dateTime_openssl2canonical failed to convert date string ${in_date}" >&2
+		echo "ERROR: ${0##*/}:$FUNCNAME failed to convert date string ${in_date}" >&2
 		return $exit_status
 	fi
 
@@ -145,7 +145,7 @@ dateTime_apache2canonical () {
 dateTime_canonical2secs () {
 	local in_date="$1"
 	if [ -z "${in_date}" ] ; then
-		echo "ERROR: ${0##*/}:dateTime_canonical2secs requires command-line arg" >&2
+		echo "ERROR: ${0##*/}:$FUNCNAME requires command-line arg" >&2
 		return 1
 	fi
 
@@ -165,7 +165,7 @@ dateTime_canonical2secs () {
 
 	local exit_status=$?
 	if [ $exit_status -ne 0 ]; then
-		echo "ERROR: ${0##*/}:dateTime_canonical2secs failed to convert date string ${in_date}" >&2
+		echo "ERROR: ${0##*/}:$FUNCNAME failed to convert date string ${in_date}" >&2
 		return $exit_status
 	fi
 
@@ -177,7 +177,7 @@ dateTime_canonical2secs () {
 dateTime_secs2canonical () {
 	local in_secs="$1"
 	if [ -z "${in_secs}" ] ; then
-		echo "ERROR: ${0##*/}:dateTime_secs2canonical requires command-line arg" >&2
+		echo "ERROR: ${0##*/}:$FUNCNAME requires command-line arg" >&2
 		return 1
 	fi
 
@@ -193,7 +193,7 @@ dateTime_secs2canonical () {
 
 	local exit_status=$?
 	if [ $exit_status -ne 0 ]; then
-		echo "ERROR: ${0##*/}:dateTime_secs2canonical failed to convert seconds ${in_secs}" >&2
+		echo "ERROR: ${0##*/}:$FUNCNAME failed to convert seconds ${in_secs}" >&2
 		return $exit_status
 	fi