"Mon, 27 Apr 1970 07:11:55"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700427
Only TIME
07:11:55
General datetime
1970-04-27 07:11:55Z
For Database
1970-04-27 07:11:55
For HTTP1.1
Mon, 27 Apr 1970 07:11:55 GMT