"Sat, 10 Jan 1970 05:31:50"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700110
Only TIME
05:31:50
General datetime
1970-01-10 05:31:50Z
For Database
1970-01-10 05:31:50
For HTTP1.1
Sat, 10 Jan 1970 05:31:50 GMT