"Mon, 12 Jan 1970 18:25:51"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700112
Only TIME
18:25:51
General datetime
1970-01-12 18:25:51Z
For Database
1970-01-12 18:25:51
For HTTP1.1
Mon, 12 Jan 1970 18:25:51 GMT