This initial instant (the “zero instant”) is called the Unix Epoch, whose value is 1970-01-01T00:00Z (January 1, 1970, midnight, UTC 1).
And the timestamp usually has its value in seconds or milliseconds, it can be a positive number (for times that occur after Unix Epoch)
or negative (for times before Unix Epoch).
This initial instant (the “zero instant”) is called the Unix Epoch, whose value is 1970-01-01T00:00Z (January 1, 1970, midnight, UTC 1).
And the timestamp usually has its value in seconds or milliseconds, it can be a positive number (for times that occur after Unix Epoch)
or negative (for times before Unix Epoch).
Use this formula - =(A1/86400)+25569+(n/24)
it is and the logic that and the date and time of the right here you showed is 1 day early and 11 hours more