"Thu, 01 Jan 1970 07:39:42"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700101
Only TIME
07:39:42
General datetime
1970-01-01 07:39:42Z
For Database
1970-01-01 07:39:42
For HTTP1.1
Thu, 01 Jan 1970 07:39:42 GMT