"Tue, 27 Jan 1970 14:29:25"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700127
Only TIME
14:29:25
General datetime
1970-01-27 14:29:25Z
For Database
1970-01-27 14:29:25
For HTTP1.1
Tue, 27 Jan 1970 14:29:25 GMT