"Fri, 09 Jan 1970 21:47:25"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700109
Only TIME
21:47:25
General datetime
1970-01-09 21:47:25Z
For Database
1970-01-09 21:47:25
For HTTP1.1
Fri, 09 Jan 1970 21:47:25 GMT