"Sat, 17 Jan 1970 11:04:55"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700117
Only TIME
11:04:55
General datetime
1970-01-17 11:04:55Z
For Database
1970-01-17 11:04:55
For HTTP1.1
Sat, 17 Jan 1970 11:04:55 GMT