"Thu, 12 Mar 1970 12:02:35"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700312
Only TIME
12:02:35
General datetime
1970-03-12 12:02:35Z
For Database
1970-03-12 12:02:35
For HTTP1.1
Thu, 12 Mar 1970 12:02:35 GMT