"Sat, 17 Jan 1970 12:53:18"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700117
Only TIME
12:53:18
General datetime
1970-01-17 12:53:18Z
For Database
1970-01-17 12:53:18
For HTTP1.1
Sat, 17 Jan 1970 12:53:18 GMT