"Sun, 11 Jan 1970 00:52:48"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700111
Only TIME
00:52:48
General datetime
1970-01-11 00:52:48Z
For Database
1970-01-11 00:52:48
For HTTP1.1
Sun, 11 Jan 1970 00:52:48 GMT