"Mon, 19 Jan 1970 18:03:22"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700119
Only TIME
18:03:22
General datetime
1970-01-19 18:03:22Z
For Database
1970-01-19 18:03:22
For HTTP1.1
Mon, 19 Jan 1970 18:03:22 GMT