"Thu, 08 Jan 1970 00:39:42"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700108
Only TIME
00:39:42
General datetime
1970-01-08 00:39:42Z
For Database
1970-01-08 00:39:42
For HTTP1.1
Thu, 08 Jan 1970 00:39:42 GMT