"Thu, 01 Jan 1970 14:57:33"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700101
Only TIME
14:57:33
General datetime
1970-01-01 14:57:33Z
For Database
1970-01-01 14:57:33
For HTTP1.1
Thu, 01 Jan 1970 14:57:33 GMT