"Sat, 03 Jan 1970 11:05:36"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700103
Only TIME
11:05:36
General datetime
1970-01-03 11:05:36Z
For Database
1970-01-03 11:05:36
For HTTP1.1
Sat, 03 Jan 1970 11:05:36 GMT