diff --git a/fetch_fio_fine.sh b/fetch_fio_fine.sh
index 09f2e65..ef67c8f 100644
--- a/fetch_fio_fine.sh
+++ b/fetch_fio_fine.sh
@@ -1,8 +1,8 @@
 #!/bin/sh
 #
-# fetch_fio.sh
+# fetch_fio_fine.sh
 #
-# Fio API account statements fetcher.
+# Fio API fine-grained account statements fetcher.
 #
 # ISC License
 #
@@ -148,16 +148,85 @@ download_file() {
 }
 
 #
-# Downloads single year
+# Leap year?
+leap_year() {
+    YEAR="$1"
+    ym4=`expr "$YEAR" % 4`
+    ym100=`expr "$YEAR" % 100`
+    ym400=`expr "$YEAR" % 400`
+    if [ $ym4 = 0 ] ; then
+	# Maybe
+	if ! [ $ym100 = 0 ] ; then
+	    # Leap
+	    return 0
+	else
+	    # Maybe
+	    if [ $ym400 = 0 ] ; then
+		# Leap
+		return 0
+	    else
+		# Not leap
+		return 1
+	    fi
+	fi
+    else
+	# Not leap
+	return 1
+    fi
+}
+
+#
+# Returns the last day of given month in Fio format
+# $1 - year
+# $2 - month
+# $3 - if non-empty, return ISO
+end_of_month() {
+    YEAR="$1"
+    MONTH="$2"
+    case $MONTH in
+	01) DAY=31 ;;
+	02)
+	    DAY=$(
+		if leap_year $YEAR ; then
+		    echo 29
+		else
+		    echo 28
+		fi
+	       )
+	    ;;
+	03) DAY=31 ;;
+	04) DAY=30 ;;
+	05) DAY=31 ;;
+	06) DAY=30 ;;
+	07) DAY=31 ;;
+	08) DAY=31 ;;
+	09) DAY=30 ;;
+	10) DAY=31 ;;
+	11) DAY=30 ;;
+	12) DAY=31 ;;
+    esac
+    if [ -z "$3" ] ; then
+	echo "$DAY.$MONTH.$YEAR"
+    else
+	echo "$YEAR-$MONTH-$DAY"
+    fi
+}
+
+#
+# Downloads single year month
 # $1 - apikey
 # $2 - year
-# $3 - destination file name
-download_year() {
+# $3 - month - must be in MM format already
+# $4 - destination file name
+download_year_month() {
     apikey="$1"
     year="$2"
-    fname="$3"
-    log "Downloading ${APIURI}/periods/.../$year-01-01/$year-12-31/transactions.csv to $fname"
-    download_file "${APIURI}/periods/$apikey/$year-01-01/$year-12-31/transactions.csv" "$fname"
+    month="$3"
+    fname="$4"
+    STARTDATE="$year-$month-01"
+    ENDDATE=`end_of_month $year $month 1`
+    log "Downloading ${APIURI}/periods/.../$STARTDATE/$ENDDATE/transactions.csv to $fname"
+    download_file "${APIURI}/periods/$apikey/$STARTDATE/$ENDDATE/transactions.csv" "$fname"
 }
 
 #