user91194: I have a doubt, how the miner starts to count the timestamp to insert in the block.
An example the timestamp insert inside the genesis block is 1/3/2009, 7:15:05 PM GMT+1. If the genesis block would have been mined the time is the moment to the miner have started to resolve the proof-of-work or is the moment to the miner win the proof-of-work?

user48884: The timestamp is set by the miner and is part of the data hashed for the Proof of Work. So it is set at the time the miner begins hashing a particular header and searching for a nonce for it.

91194: <p>I have a doubt, how the miner starts to count the timestamp to insert in the block.</p>

<p>An example the timestamp insert inside the genesis block is 1/3/2009, 7:15:05 PM GMT+1. If the genesis block would have been mined the time is the moment to the miner have started to resolve the proof-of-work or is the moment to the miner win the proof-of-work?</p>
 48884: <p>The timestamp is set by the miner and is part of the data hashed for the Proof of Work. So it is set at the time the miner begins hashing a particular header and searching for a nonce for it.</p>
