How can I find the time of a purchase on apple support

See -> View your purchase history for the App Store, iTunes Store, and other Apple media services

View your purchase history for the App Store, iTunes Store, and other Apple media services - Apple Support

Hi there! Looks like you are wanting to know how to check for actual date of purchase on your account.

If you can go to your purchase history using an iPhone

Settings > tap your name > Media & Purchases > View account > Purchase History

You will be able to see the date of purchase there

If you tap on Total Billed > and tap again on the amount >, you will then see the actual date of purchase.

This is important especially if you are charged for an item but you don't recall purchasing one recently. Sometimes, you are billed by Apple a fews days after the purchase was made.

Hope this helps!