"Thu, 08 Jan 1970 00:38:56"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700108
Only TIME
00:38:56
General datetime
1970-01-08 00:38:56Z
For Database
1970-01-08 00:38:56
For HTTP1.1
Thu, 08 Jan 1970 00:38:56 GMT