printf '%02i:%02i\n' "${h#0}" "${m#0}"
return 0
}
+
+numdays(){
+ # return number of days in a month (i.e. 28, 29, 30, or 31)
+ local y="$1" m="${2#0}"
+
+ case $m in
+ 1|3|5|7|10|12)
+ printf 31\\n
+ ;;
+ 4|6|8|9|11)
+ printf 30\\n
+ ;;
+ 2) if [ "$((y % 400))" -eq 0 ]; then
+ printf 29\\n
+ elif [ "$((y % 100))" -eq 0 ]; then
+ printf 28\\n
+ elif [ "$((y % 4))" -eq 0 ]; then
+ printf 29\\n
+ else
+ printf 28\\n
+ fi
+ ;;
+ *) return 1;;
+ esac
+}