Hi Ashley.singapore,
Thank you for reaching out to us on the Microsoft Q&A forum.
I tested the date format change on my end, and it worked successfully. I’ve attached screenshots to demonstrate how I applied the formula Text(DatePicker1.SelectedDate, "dd/mm/yyyy") in Power Apps, which converts the selected date to display in the day/month/year format.
If you are still facing any issue, please let us know in the comments and where you are encountering this error along with the screenshot for reference. We are glad to help you.
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