"Sat, 17 Jan 1970 05:50:41"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700117
Only TIME
05:50:41
General datetime
1970-01-17 05:50:41Z
For Database
1970-01-17 05:50:41
For HTTP1.1
Sat, 17 Jan 1970 05:50:41 GMT