"Sat, 17 Jan 1970 12:52:32"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700117
Only TIME
12:52:32
General datetime
1970-01-17 12:52:32Z
For Database
1970-01-17 12:52:32
For HTTP1.1
Sat, 17 Jan 1970 12:52:32 GMT