"Tue, 27 Jan 1970 22:40:54"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700127
Only TIME
22:40:54
General datetime
1970-01-27 22:40:54Z
For Database
1970-01-27 22:40:54
For HTTP1.1
Tue, 27 Jan 1970 22:40:54 GMT