Attaches a calendar notification to a widget. lain.widgets.calendar:attach(mywidget) - Left click: switch to previous month. - Right click: switch to next month. Optionally you can call the function with background and foreground colors arguments, both or just one: lain.widgets.calendar:attach(mytextclock, "#FFFFFF", "#000000") -- or lain.widgets.calendar:attach(mytextclock, "#FFFFFF") -- or lain.widgets.calendar:attach(mytextclock, nil, "#000000") Notification will show an icon displaying current day, and formatted output from ``cal`` with current day highlighted. Calendar icons are placed in [lain/icons/cal](https://github.com/copycat-killer/lain/tree/master/icons/cal), default set being ``white``. You can add your own set, and tell lain to use it like this: lain.widgets.calendar.icons_dir = lain.widgets.icons_dir .. "cal/myicons" also, you can set notification font size: lain.widgets.calendar.font_size = 14 default is 12. Finally, you can call the notification with a key binding like this: awful.key({ altkey }, "c", function () lain.widgets.calendar:show(7) end), where ``altkey = "Mod1"`` and ``show`` argument is an optional integer, meaning timeout seconds.