"Sun, 11 Jan 1970 07:39:34"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700111
Only TIME
07:39:34
General datetime
1970-01-11 07:39:34Z
For Database
1970-01-11 07:39:34
For HTTP1.1
Sun, 11 Jan 1970 07:39:34 GMT