"Sat, 10 Jan 1970 14:14:43"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700110
Only TIME
14:14:43
General datetime
1970-01-10 14:14:43Z
For Database
1970-01-10 14:14:43
For HTTP1.1
Sat, 10 Jan 1970 14:14:43 GMT