Set the date and time automatically
You can have the date and time set automatically using a network time server. Be sure your time is correct so time stamps on emails, messages, and files are correct.
Terra Data Centers Time Server Source
Time Server Hostname | Pool |
time.terradatacenters.com | Yes |
Mac Desktop
To change these settings, choose Apple menu 
in the sidebar, then click Date & Time on the right. (You may need to scroll down.)