How to AutoRun a macro every day at a scheduled time

I want to know how I can make my reminder macro auto-run at a specific time every day.

Code in Workbook: 

Private Sub Workbook_Open()

Application.OnTime TimeValue("10.54.00"), "Mail_reminders"

End Sub

Code in Module:

Sub Mail_reminders()

Application.OnTime TimeValue("10.54.00"), "Mail_reminders"

Dim myApp As Outlook.Application

Dim mymail As Outlook.MailItem

Dim mydate1 As Date

Dim mydate2 As Long

Dim datetoday1 As Date

Dim datetoday2 As Long

Dim x As Long

lastrow = Sheets("Sheet1").Cells(Rows.Count, 3).End(xlUp).Row

For x = 4 To lastrow

mydate1 = Cells(x, 12).Value

mydate2 = mydate1

Cells(x, 15).Value = mydate2

datetoday1 = Date

datetoday2 = datetoday1

Cells(x, 16).Value = datetoday

If mydate2 - datetoday2 = 0 Then

Set myApp = New Outlook.Application

Set mymail = myApp.CreateItem(olMailItem)

mymail.To = Cells(x, 11).Value

With mymail

.Subject = "Reminder"

.Body = Cells(x, 20).Text

.Display

'.send

End With

Cells(x, 13) = "Reminder sent"

Cells(x, 13).Interior.ColorIndex = 46

Cells(x, 13).Font.ColorIndex = 2

Cells(x, 13).Font.Bold = True

Cells(x, 14).Value = mydate2 - datetoday2

End If

Next

Set myApp = Nothing

Set mymail = Nothing

End Sub 

Moved from: Office Excel  / Windows 10  / Office 2019