"Thu, 15 Jan 1970 18:13:18"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700115
Only TIME
18:13:18
General datetime
1970-01-15 18:13:18Z
For Database
1970-01-15 18:13:18
For HTTP1.1
Thu, 15 Jan 1970 18:13:18 GMT