"Wed, 15 Apr 1970 07:11:30"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700415
Only TIME
07:11:30
General datetime
1970-04-15 07:11:30Z
For Database
1970-04-15 07:11:30
For HTTP1.1
Wed, 15 Apr 1970 07:11:30 GMT