"Sat, 03 Jan 1970 10:00:39"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700103
Only TIME
10:00:39
General datetime
1970-01-03 10:00:39Z
For Database
1970-01-03 10:00:39
For HTTP1.1
Sat, 03 Jan 1970 10:00:39 GMT