"Sun, 11 Jan 1970 07:38:51"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700111
Only TIME
07:38:51
General datetime
1970-01-11 07:38:51Z
For Database
1970-01-11 07:38:51
For HTTP1.1
Sun, 11 Jan 1970 07:38:51 GMT