Install gcalcli and Conky

sudo apt install gcalcli conky-all

Connect gcalcli with your Google account.

gcalcli list
        conky.config = {
            background = true,
            update_interval = 1.5,
            cpu_avg_samples = 2,
            net_avg_samples = 2,
            out_to_console = false,
            override_utf8_locale = true,
            double_buffer = true,
            no_buffers = true,
            text_buffer_size = 32768,
            imlib_cache_size = 0,
            own_window = true,
            own_window_type = 'desktop',
            own_window_argb_visual = true,
            own_window_argb_value = 120,
            own_window_hints = 'undecorated,below,sticky,skip_taskbar,skip_pager',
            border_inner_margin = 10,
            border_outer_margin = 0,
            xinerama_head = 1,
            alignment = 'top_right',
            gap_x = 90,
            gap_y = 90,
            draw_shades = true,
            draw_outline = false,
            draw_borders = false,
            draw_graph_borders = false,
            use_xft = true,
            font = 'Ubuntu Mono:size=12',
            xftalpha = 0.8,
            uppercase = false,
            default_color = '#FFFFFF',
            own_window_colour = '#000000',
            minimum_width = 0, minimum_height = 0,
        };

        conky.text = [[
            ${execpi 300 PYTHONIOENCODING=utf8 gcalcli --conky --nolineart calm --monday}
        ]];

Now run Conky with this configuration by typing this in a terminal:

conky

conky -c ~/.conkyrc2

lose all running Conky instances, use:

killall -9 conky

${execpi 300 PYTHONIOENCODING=utf8 gcalcli --conky --nolineart --nocolor calm --monday}
${execpi 300 PYTHONIOENCODING=utf8 gcalcli --conky --nolineart calw --monday}

Por exemplo conky.text = [[ ${execpi 300 PYTHONIOENCODING=utf8 gcalcli --conky --nolineart agenda} ${execpi 300 PYTHONIOENCODING=utf8 gcalcli --conky --nolineart calm} ]];

Icone no Desktop

Criar um arquivo conky.desktop na Área de Trabalho ou em ~/.config/autostart/ com as seguintes diretivas:

    [Desktop Entry]
    Type=Application
    Exec=conky --daemonize --pause=5
    Hidden=false
    NoDisplay=false
    X-GNOME-Autostart-enabled=true
    Name=Conky Google Calendar