"Mon, 05 Jan 1970 04:39:22"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700105
Only TIME
04:39:22
General datetime
1970-01-05 04:39:22Z
For Database
1970-01-05 04:39:22
For HTTP1.1
Mon, 05 Jan 1970 04:39:22 GMT