"Thu, 12 Feb 1970 20:35:30"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700212
Only TIME
20:35:30
General datetime
1970-02-12 20:35:30Z
For Database
1970-02-12 20:35:30
For HTTP1.1
Thu, 12 Feb 1970 20:35:30 GMT