"Thu, 15 Jan 1970 14:49:18"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700115
Only TIME
14:49:18
General datetime
1970-01-15 14:49:18Z
For Database
1970-01-15 14:49:18
For HTTP1.1
Thu, 15 Jan 1970 14:49:18 GMT