"Wed, 29 Apr 1970 07:12:34"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700429
Only TIME
07:12:34
General datetime
1970-04-29 07:12:34Z
For Database
1970-04-29 07:12:34
For HTTP1.1
Wed, 29 Apr 1970 07:12:34 GMT