"Sun, 11 Jan 1970 12:31:19"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700111
Only TIME
12:31:19
General datetime
1970-01-11 12:31:19Z
For Database
1970-01-11 12:31:19
For HTTP1.1
Sun, 11 Jan 1970 12:31:19 GMT