"Thu, 12 Feb 1970 12:03:51"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700212
Only TIME
12:03:51
General datetime
1970-02-12 12:03:51Z
For Database
1970-02-12 12:03:51
For HTTP1.1
Thu, 12 Feb 1970 12:03:51 GMT