nixos-configs/config/eww/date/date.yuck

(defwidget divider []
  (box :class "divider"
       :orientation "v"
       :space-evenly true)
)

(defwidget time []
  (box :class "timebox"
       :orientation "v"
       :space-evenly false
    (box :class "time-container"
         :orientation "h"
         :space-evenly false
         :halign "center"
         :valign "center"
      (label :text "${lithour}" :class "content")
      (divider)
      (label :text "${litmin}" :class "content")
    )
    (box :class "date-container"
         :orientation "h"
         :space-evenly true
         :halign "center"
      (label :text "${completeday}")
    )
  )
)

(defwidget cal []
  (box :class "cal-box"
       :orientation "v"
       :space-evenly false
    (calendar :class "cal"
              :day calendar_day
              :month calendar_month
              :year calendar_year)
  )
)

(defwidget date []
  (box :class "date"
       :orientation "v"
       :space-evenly false
    (time)
    (cal)
  )
)

(defvar date-visible false)

(defwindow date-reveal
  :monitor 0
  :stacking "overlay"
  :geometry (geometry :x "70px"
                      :y "8px"
                      :width "0px" ; automatically generated
                      :height "0px" ; automatically generated
                      :anchor "top right")
     (revealer
        :transition "crossfade"
        :reveal date-visible
        :duration "550ms"
(date)))