"Thu, 12 Feb 1970 18:13:04"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700212
Only TIME
18:13:04
General datetime
1970-02-12 18:13:04Z
For Database
1970-02-12 18:13:04
For HTTP1.1
Thu, 12 Feb 1970 18:13:04 GMT