"Fri, 27 Feb 1970 12:03:04"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700227
Only TIME
12:03:04
General datetime
1970-02-27 12:03:04Z
For Database
1970-02-27 12:03:04
For HTTP1.1
Fri, 27 Feb 1970 12:03:04 GMT