"Tue, 27 Jan 1970 18:14:53"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700127
Only TIME
18:14:53
General datetime
1970-01-27 18:14:53Z
For Database
1970-01-27 18:14:53
For HTTP1.1
Tue, 27 Jan 1970 18:14:53 GMT