"Sat, 24 Jan 1970 18:27:14"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700124
Only TIME
18:27:14
General datetime
1970-01-24 18:27:14Z
For Database
1970-01-24 18:27:14
For HTTP1.1
Sat, 24 Jan 1970 18:27:14 GMT