PROMPT_COMMAND='PS1_RUN_PREEXEC=1'
preexec() {
    if [ -z "$PS1_RUN_PREEXEC" ]; then
        return
    fi
    unset PS1_RUN_PREEXEC
    echo $'\e[38;5;241m'"[$(date +'%Y-%m-%dT%H:%M:%S%z')]"$'\e[0m'
}
trap 'preexec' DEBUG