"Mon, 06 Apr 1970 07:12:21"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700406
Only TIME
07:12:21
General datetime
1970-04-06 07:12:21Z
For Database
1970-04-06 07:12:21
For HTTP1.1
Mon, 06 Apr 1970 07:12:21 GMT