"Tue, 27 Jan 1970 18:25:05"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700127
Only TIME
18:25:05
General datetime
1970-01-27 18:25:05Z
For Database
1970-01-27 18:25:05
For HTTP1.1
Tue, 27 Jan 1970 18:25:05 GMT