"Sat, 17 Jan 1970 01:00:39"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700117
Only TIME
01:00:39
General datetime
1970-01-17 01:00:39Z
For Database
1970-01-17 01:00:39
For HTTP1.1
Sat, 17 Jan 1970 01:00:39 GMT