Email: Gmail starts sending mails from Future :)

This event is about to be held in EXPO Center, Karachi for which I was invited for the exhibition. The interesting part is that Google tells me that the email was sent "-1" minutes ago. Which means that if something is sent 1 min ago, it is past, if it is sent 0 minutes ago then it is present and if it is sent "-1" minutes "ago" means its future isn't it :D

Kind of funny that I was able to capture that just as the email was sent. Though I'm curious that how it could happen!? (No it is not edited) What time stamp does Gmail attach to the emails sent? Is the Gmail server time and the scripting not going along with each other lately? Or is Google literally "so ahead of its time" :-p