"Sat, 03 Jan 1970 11:02:18"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700103
Only TIME
11:02:18
General datetime
1970-01-03 11:02:18Z
For Database
1970-01-03 11:02:18
For HTTP1.1
Sat, 03 Jan 1970 11:02:18 GMT