how can I pick a specific date to restore restore my iphone from the cloud.

Greetings vivienne208!

Looks like you are trying to restore a backup to your iPhone from iCloud, and want to choose a specific date it was backed up as well. We want to help! Currently you can't choose a specific date to restore an iCloud backup, it will just restore the most recent: Restore or set up your device from an iCloud backup. You can choose a backup via iTunes however if you save multiple. This article shows how to check what backups you currently have saved in iTunes: Locate backups of your iPhone, iPad, and iPod touch.

We hope that helps clear up some options you have in this case. Have a great rest of your day!