Crypto received date determination

What is the definition of the crypto received date? Is it the date when I can benefit from it?

 If I cannot sale it because it is stacked/locked for another 3 years, or not being exchanged at the currency exchanges then probably I did not receive it. At some forums I have read that the received date is determined by when you take the control over the digital assets. So if it is not available for me yet as it is locked, then I do not have control over it and hence I still did not receive it yet. Please kindly confirm my understanding. Thanks!