Fix display of years.

lib/date.js

@@ -4,6 +4,7 @@ import {
   addHours,
   addDays,
   addMonths,
+  addYears,
   subHours,
   subDays,
   startOfHour,
@@ -19,6 +20,7 @@ import {
   differenceInHours,
   differenceInCalendarDays,
   differenceInCalendarMonths,
+  differenceInCalendarYears,
 } from 'date-fns';
 
 export function getTimezone() {
@@ -90,7 +92,7 @@ export function getDateRangeValues(startDate, endDate) {
     return { startDate: startOfHour(startDate), endDate: endOfHour(endDate), unit: 'hour' };
   } else if (differenceInCalendarDays(endDate, startDate) <= 90) {
     return { startDate: startOfDay(startDate), endDate: endOfDay(endDate), unit: 'day' };
-  } else if (differenceInCalendarMonths(endDate, startDate) <= 12) {
+  } else if (differenceInCalendarMonths(endDate, startDate) <= 24) {
     return { startDate: startOfMonth(startDate), endDate: endOfMonth(endDate), unit: 'month' };
   }
   return { startDate: startOfYear(startDate), endDate: endOfYear(endDate), unit: 'year' };
@@ -100,6 +102,7 @@ const dateFuncs = {
   hour: [differenceInHours, addHours, startOfHour],
   day: [differenceInCalendarDays, addDays, startOfDay],
   month: [differenceInCalendarMonths, addMonths, startOfMonth],
+  year: [differenceInCalendarYears, addYears, startOfYear],
 };
 
 export function getDateArray(data, startDate, endDate, unit) {