When creating a customer group from the loyalty section: 

You can set the discount to only apply to certain items, and to a certain time period.
To achieve this, click on edit on the customer group: 

Here you edit:

  • If it shall apply to pickup and/or delivery. 
  • The discount percentage. 
  • One time discount: Meaning each customer can use it only once
  • Auto member: Meaning all your customers become part of this group automatically 

On the right side: You select which menu categories to apply for.
NOTE: Do NOT
select any if it applies to your whole menu! 

Then: On Time you can select which days and/or time this discount applies to. You can also set an expiry time, meaning customers has a limited amount of time to use the discount. 

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