"Sun, 11 Jan 1970 04:39:10"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700111
Only TIME
04:39:10
General datetime
1970-01-11 04:39:10Z
For Database
1970-01-11 04:39:10
For HTTP1.1
Sun, 11 Jan 1970 04:39:10 GMT