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diff --git a/shell-completion/zsh/_timedatectl b/shell-completion/zsh/_timedatectl
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+#compdef timedatectl                    -*- shell-script -*-
+# SPDX-License-Identifier: LGPL-2.1-or-later
+
+_timedatectl_set-timezone(){
+    local -a _timezones
+    _timezones=( ${(f)"$(_call_program timezones "${service}" list-timezones)"} )
+    compadd "$_timezones[@]"
+}
+
+_timedatectl_set-time(){
+    _message "YYYY-MM-DD HH:MM:SS"
+}
+
+_timedatectl_set-local-rtc(){
+    local -a _options
+    _options=(
+        '0:Maintain RTC in universal time'
+        '1:Maintain RTC in local time'
+    )
+    _describe options _options
+}
+
+_timedatectl_set-ntp(){
+    local -a _options
+    _options=(
+        '0:Disable NTP based network time configuration'
+        '1:Enable NTP based network time configuration'
+    )
+    _describe options _options
+}
+
+_timedatectl_command(){
+    local -a _timedatectl_cmds
+    _timedatectl_cmds=(
+        'status:Show current time settings'
+        'set-time:Set system time'
+        'set-timezone:Set system timezone'
+        'list-timezones:Show known timezones'
+        'set-local-rtc:Control whether RTC is in local time'
+        'set-ntp:Control whether NTP is enabled'
+    )
+    if (( CURRENT == 1 )); then
+        _describe -t commands 'timedatectl command' _timedatectl_cmds
+    else
+        local curcontext="$curcontext"
+        cmd="${${_timedatectl_cmds[(r)$words[1]:*]%%:*}}"
+        if (( $#cmd )); then
+            if (( $+functions[_timedatectl_$cmd] )); then
+                _timedatectl_$cmd
+            else
+                _message "no more options"
+            fi
+        else
+            _message "unknown timedatectl command: $words[1]"
+        fi
+    fi
+}
+
+_arguments -s \
+    {-h,--help}'[Show this help]' \
+    '--version[Show package version]' \
+    '--adjust-system-clock[Adjust system clock when changing local RTC mode]' \
+    '--no-pager[Do not pipe output into a pager]' \
+    '--no-ask-password[Do not prompt for password]' \
+    {-H+,--host=}'[Operate on remote host]:userathost:_sd_hosts_or_user_at_host' \
+    {-M+,--machine=}'[Operate on local container]:machines:_sd_machines' \
+    '*::timedatectl commands:_timedatectl_command'