diff --git a/src/components/DateTimePicker/utils.ts b/src/components/DateTimePicker/utils.ts
index 4cb57be..8f0c28a 100644
--- a/src/components/DateTimePicker/utils.ts
+++ b/src/components/DateTimePicker/utils.ts
@@ -25,7 +25,7 @@ export const getDaysInMonth = (year: number, month: number): number => {
 export const format = (hour: string, minute: string, period: string) => {
   const formattedHour = hour === '12' ? (period === 'AM' ? '00' : '12') : (period === 'PM' ? String(Number(hour) + 12) : hour)
   const formattedMinute = normalize(minute, 2)
-  return `${formattedHour}:${formattedMinute}`
+  return `${normalize(formattedHour, 2)}:${formattedMinute}`
 }
 
 export const parse = (value: string) => {