Added year option.

components/DateFilter.js

@@ -10,6 +10,7 @@ const filterOptions = [
   { label: 'Today', value: '1day' },
   { label: 'This week', value: '1week' },
   { label: 'This month', value: '1month' },
+  { label: 'This year', value: '1year' },
 ];
 
 export default function DateFilter({ value, onChange }) {

components/PageviewsChart.js

@@ -12,12 +12,15 @@ export default function PageviewsChart({ data, unit, children }) {
     (label, index, values) => {
       const d = new Date(values[index].value);
       const n = data.pageviews.length;
+
       switch (unit) {
         case 'day':
           if (n >= 15) {
             return index % ~~(n / 15) === 0 ? format(d, 'MMM d') : '';
           }
           return format(d, 'EEE M/d');
+        case 'month':
+          return format(d, 'MMMM');
         default:
           return label;
       }