#!/bin/bash
# %-d strips the leading zero so "06" becomes "6" — needed for bracket matching below.
today=$(date +%-d)
# %u is ISO weekday: 1=Monday … 7=Sunday.
weekdaynum=$(date +%u)
weekday=""
# Map ISO weekday number to the two-letter abbreviation that `cal` prints in its header.
if [[ $weekdaynum -eq 1 ]]; then
	weekday="Mo"
elif [[ $weekdaynum -eq 2 ]]; then
	weekday="Tu"
elif [[ $weekdaynum -eq 3 ]]; then
	weekday="We"
elif [[ $weekdaynum -eq 4 ]]; then
	weekday="Th"
elif [[ $weekdaynum -eq 5 ]]; then
	weekday="Fr"
elif [[ $weekdaynum -eq 6 ]]; then
	weekday="Sa"
elif [[ $weekdaynum -eq 7 ]]; then
	weekday="Su"
fi

echo ======================
date '+%A, %d.%m.%Y'
echo ======================
# -m: start week on Monday. `sed 's/^/ /'` indents every line for padding.
# The two substitutions wrap today's date number and the current weekday column
# in square brackets so Eww can highlight them via CSS class matching.
cal -m | sed -e 's/^/ /' | sed "s/ $today /[$today]/" | sed "s/ $weekday /[$weekday]/"