"Sun, 19 Apr 1970 07:11:57"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700419
Only TIME
07:11:57
General datetime
1970-04-19 07:11:57Z
For Database
1970-04-19 07:11:57
For HTTP1.1
Sun, 19 Apr 1970 07:11:57 GMT