diff --git a/lib/date.js b/lib/date.js
index 63bad45e..cdfe322c 100644
--- a/lib/date.js
+++ b/lib/date.js
@@ -100,6 +100,19 @@ export function getDateRangeValues(startDate, endDate) {
   return { startDate: startOfDay(startDate), endDate: endOfDay(endDate), unit };
 }
 
+export function getDateFromString(str) {
+  const [ymd, hms] = str.split(' ');
+  const [year, month, day] = ymd.split('-');
+
+  if (hms) {
+    const [hour, min, sec] = hms.split(':');
+
+    return new Date(year, month - 1, day, hour, min, sec);
+  }
+
+  return new Date(year, month - 1, day);
+}
+
 const dateFuncs = {
   hour: [differenceInHours, addHours, startOfHour],
   day: [differenceInCalendarDays, addDays, startOfDay],
@@ -114,12 +127,7 @@ export function getDateArray(data, startDate, endDate, unit) {
 
   function findData(t) {
     const x = data.find(e => {
-      if (unit === 'hour') {
-        return normalize(new Date(e.t)).getTime() === t.getTime();
-      }
-
-      const [year, month, day] = e.t.split('-');
-      return normalize(new Date(year, month - 1, day)).getTime() === t.getTime();
+      return normalize(getDateFromString(e.t)).getTime() === t.getTime();
     });
 
     return x?.y || 0;