"Thu, 12 Feb 1970 00:02:48"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700212
Only TIME
00:02:48
General datetime
1970-02-12 00:02:48Z
For Database
1970-02-12 00:02:48
For HTTP1.1
Thu, 12 Feb 1970 00:02:48 GMT