"Sat, 07 Feb 1970 19:39:34"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700207
Only TIME
19:39:34
General datetime
1970-02-07 19:39:34Z
For Database
1970-02-07 19:39:34
For HTTP1.1
Sat, 07 Feb 1970 19:39:34 GMT