"Thu, 01 Jan 1970 17:11:42"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700101
Only TIME
17:11:42
General datetime
1970-01-01 17:11:42Z
For Database
1970-01-01 17:11:42
For HTTP1.1
Thu, 01 Jan 1970 17:11:42 GMT