"Tue, 27 Jan 1970 14:57:27"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700127
Only TIME
14:57:27
General datetime
1970-01-27 14:57:27Z
For Database
1970-01-27 14:57:27
For HTTP1.1
Tue, 27 Jan 1970 14:57:27 GMT