#!/usr/bin/env bash
for n in $(seq 0 31); do date -d"$n days ago" "+%Y/%m/%d (%a)"; done \
    | fzf --height 50% --reverse --delimiter '/' \
      --preview="gcal -H yes %{1}{2}{3} && hledger --color=yes reg date:\$(cut -f1 -d' ' <<< {1}-{2}-{3})" \
      --preview-window 'noborder,right,80%' \
      --header-first --header "Today is $(date '+%Y/%m/%d (%a)')"