"Thu, 22 Jan 1970 19:39:27"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700122
Only TIME
19:39:27
General datetime
1970-01-22 19:39:27Z
For Database
1970-01-22 19:39:27
For HTTP1.1
Thu, 22 Jan 1970 19:39:27 GMT