"Mon, 12 Jan 1970 02:47:07"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700112
Only TIME
02:47:07
General datetime
1970-01-12 02:47:07Z
For Database
1970-01-12 02:47:07
For HTTP1.1
Mon, 12 Jan 1970 02:47:07 GMT