"Wed, 29 Apr 1970 07:11:38"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700429
Only TIME
07:11:38
General datetime
1970-04-29 07:11:38Z
For Database
1970-04-29 07:11:38
For HTTP1.1
Wed, 29 Apr 1970 07:11:38 GMT