Yes, you can: the confirmation time is the blocktime from the block in which a transaction has been written to the blockchain. This is the timestamp that Electrum shows in the History tab, but of course only for transactions of your own wallet! Once a transaction is confirmed in a block, the blocktime shows up in the History tab.
Thats sounds exactly what I am searching for.
But: when the "Date" column in "History" tab is the confirmation time from Blockchain then where is the send time (=time when I send the transaction request to mempool)?
I though at first it was the opposite.
And one more related question:
The timestamp in "Date" column: Which timezone is it?
e.g. Central European time or US West Cost time or .....?