What the hell are you talking about?
We are talking about the "UNIX Time". The UNIX is a number defined as the number of seconds elapsed since midnight Coordinated Universal Time (UTC) of January 1, 1970. You can easily calculate or save times with this number. Read more wikipedia
Does TIMESTAMP 1234567890 mean the end of mankind?
Probably not... but you never know.
Can I buy TIMESTAMP 1234567890?
Return to topic 1. You can do a lot of funny things with a timestamp - but buying?!
Do we really need timestamp?
Absolutely yes! Without timestamp you can't do any time in computers.