"Thu, 01 Jan 1970 23:36:13"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700101
Only TIME
23:36:13
General datetime
1970-01-01 23:36:13Z
For Database
1970-01-01 23:36:13
For HTTP1.1
Thu, 01 Jan 1970 23:36:13 GMT