"Sat, 31 Jan 1970 05:33:12"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700131
Only TIME
05:33:12
General datetime
1970-01-31 05:33:12Z
For Database
1970-01-31 05:33:12
For HTTP1.1
Sat, 31 Jan 1970 05:33:12 GMT