--- b/etc/defaults/rc.conf	Wed Mar 27 15:06:58 2019 +0100
+++ b/etc/defaults/rc.conf	Tue Apr 02 12:48:57 2019 +0200
@@ -363,9 +363,11 @@ 
 timed_enable="NO"		# Run the time daemon (or NO).
 timed_flags=""			# Flags to timed (if enabled).
 ntpdate_enable="NO"		# Run ntpdate to sync time on boot (or NO).
+ntpdate_resume_enable="NO"	# Run ntpdate to sync time on resume (or NO).
 ntpdate_program="/usr/sbin/ntpdate"	# path to ntpdate, if you want a different one.
-ntpdate_flags="-b"		# Flags to ntpdate (if enabled).
-ntpdate_config="/etc/ntp.conf"	# ntpdate(8) configuration file
+ntpdate_flags="-b"		# Flags to ntpdate used on boot (if enabled).
+ntpdate_resume_flags="-bu"	# Flags to ntpdate used on resume (if enabled).
+ntpdate_config="/etc/ntp.conf"	# ntpd(8) configuration file
 ntpdate_hosts=""		# Whitespace-separated list of ntpdate(8) servers.
 ntpd_enable="NO"		# Run ntpd Network Time Protocol (or NO).
 ntpd_program="/usr/sbin/ntpd"	# path to ntpd, if you want a different one.
--- b/etc/rc.d/ntpdate	Wed Mar 27 15:06:58 2019 +0100
+++ b/etc/rc.d/ntpdate	Tue Apr 02 12:48:57 2019 +0200
@@ -5,18 +5,43 @@ 
 
 # PROVIDE: ntpdate
 # REQUIRE: NETWORKING syslogd
-# KEYWORD: nojail
+# KEYWORD: nojail resume
 
 . /etc/rc.subr
 
 name="ntpdate"
 desc="Set the date and time via NTP"
 rcvar="ntpdate_enable"
-stop_cmd=":"
-start_cmd="ntpdate_start"
+rcvars="ntpdate_resume_enable ntpdate_program ntpdate_flags \
+ntpdate_resume_flags ntpdate_hosts ntpdate_config"
+
+ntpdate_enable_defval="NO"
+ntpdate_resume_enable_defval="NO"
+ntpdate_program_defval="/usr/sbin/ntpdate"
+ntpdate_flags_defval="-b"
+ntpdate_resume_flags_defval="-bu"
+ntpdate_hosts_defval=""
+ntpdate_config_defval="/etc/ntp.conf"
 
-ntpdate_start()
+ntpdate_enable_desc="Run ntpdate to sync time on boot."
+ntpdate_resume_enable_desc="Run ntpdate to sync time on resume \
+(if enabled at boot)."
+ntpdate_program_desc="Path to ntpdate, if you want a different one."
+ntpdate_flags_desc="Flags to ntpdate used on boot (if enabled)."
+ntpdate_resume_flags_desc="Flags to ntpdate used on resume (if enabled)."
+ntpdate_hosts_desc="Whitespace-separated list of ntp(8) servers."
+ntpdate_config_desc="ntpd(8) configuration file"
+
+extra_commands="resume"
+start_cmd="ntpdate_start"
+resume_cmd="ntpdate_resume"
+stop_cmd=":"
+
+do_ntpdate()
 {
+	local options
+	options=$1
+
 	if [ -z "$ntpdate_hosts" -a -f "$ntpdate_config" ]; then
 		ntpdate_hosts=`awk '
 			/^server[ \t]*127.127/      {next}
@@ -27,7 +52,20 @@ 
 	fi
 	if [ -n "$ntpdate_hosts" -o -n "$rc_flags" ]; then
 		echo "Setting date via ntp."
-		${ntpdate_program:-ntpdate} $rc_flags $ntpdate_hosts
+		${ntpdate_program:-ntpdate} $options $ntpdate_hosts
+	fi
+}
+
+ntpdate_start()
+{
+	do_ntpdate $rc_flags
+}
+
+ntpdate_resume()
+{
+	# We use an unprivileged port on resume because ntpd may be running.
+	if checkyesno ntpdate_resume_enable ; then
+		do_ntpdate $ntpdate_resume_flags
 	fi
 }