"Sun, 01 Feb 1970 23:32:39"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700201
Only TIME
23:32:39
General datetime
1970-02-01 23:32:39Z
For Database
1970-02-01 23:32:39
For HTTP1.1
Sun, 01 Feb 1970 23:32:39 GMT