The charitable acquisition date is the approximate date that you acquired the item that you are donating. If you are donating a group of similar items that were acquired on different dates, you can use Various as the acquisition date if you owned them at least a year.
In most instances, the date donated will be different than the date acquired. However, items that you buy and then immediately donate can be entered as a cash donation. One example of this would be buying groceries for a food bank.