"Thu, 15 Jan 1970 05:31:39"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700115
Only TIME
05:31:39
General datetime
1970-01-15 05:31:39Z
For Database
1970-01-15 05:31:39
For HTTP1.1
Thu, 15 Jan 1970 05:31:39 GMT