"Fri, 23 Jan 1970 00:09:47"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700123
Only TIME
00:09:47
General datetime
1970-01-23 00:09:47Z
For Database
1970-01-23 00:09:47
For HTTP1.1
Fri, 23 Jan 1970 00:09:47 GMT