"Sat, 10 Jan 1970 14:27:24"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700110
Only TIME
14:27:24
General datetime
1970-01-10 14:27:24Z
For Database
1970-01-10 14:27:24
For HTTP1.1
Sat, 10 Jan 1970 14:27:24 GMT