Email Template - Fields by Form Employees and variable time now

Hi, I created an email template and I would like to create the signature of emails by taking the form fields employee. In the email template I included the following variables:

$employee_first_name
$employee_last_name
$employee_full_name
$employee_name
$employee_phone_mobile

but none work. When sending the emails are not filled with the corresponding data of the employee who sent the email but remain as I wrote above.

Then I want to know which variable you have to use to enter a date (today) in the email.

Thanks for the support

Does anyone know how to do?