"Sun, 08 Feb 1970 14:11:51"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700208
Only TIME
14:11:51
General datetime
1970-02-08 14:11:51Z
For Database
1970-02-08 14:11:51
For HTTP1.1
Sun, 08 Feb 1970 14:11:51 GMT