If the date is not populating correctly on your invoices, you need to check the below option:
First, you need to check if the invoices are standard or designed.
1. If standard format, there is no need for any changes to the standard format because it is the default setting.
2. If design format is selected, then you have to check if the date field is correct or not. For this, you have to go to Administration, then select Configuration, then select Invoice/Document Printing, then select Advanced, and then select the design format and go to the header option and check the date field to correct it.