"Sun, 11 Jan 1970 07:42:42"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700111
Only TIME
07:42:42
General datetime
1970-01-11 07:42:42Z
For Database
1970-01-11 07:42:42
For HTTP1.1
Sun, 11 Jan 1970 07:42:42 GMT