"Thu, 15 Jan 1970 23:34:35"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700115
Only TIME
23:34:35
General datetime
1970-01-15 23:34:35Z
For Database
1970-01-15 23:34:35
For HTTP1.1
Thu, 15 Jan 1970 23:34:35 GMT