"Tue, 27 Jan 1970 11:25:38"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700127
Only TIME
11:25:38
General datetime
1970-01-27 11:25:38Z
For Database
1970-01-27 11:25:38
For HTTP1.1
Tue, 27 Jan 1970 11:25:38 GMT