"Mon, 09 Feb 1970 12:54:47"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700209
Only TIME
12:54:47
General datetime
1970-02-09 12:54:47Z
For Database
1970-02-09 12:54:47
For HTTP1.1
Mon, 09 Feb 1970 12:54:47 GMT