"Sat, 25 Apr 1970 07:11:31"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700425
Only TIME
07:11:31
General datetime
1970-04-25 07:11:31Z
For Database
1970-04-25 07:11:31
For HTTP1.1
Sat, 25 Apr 1970 07:11:31 GMT