"Mon, 12 Jan 1970 19:45:09"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700112
Only TIME
19:45:09
General datetime
1970-01-12 19:45:09Z
For Database
1970-01-12 19:45:09
For HTTP1.1
Mon, 12 Jan 1970 19:45:09 GMT