"Mon, 05 Jan 1970 07:40:57"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700105
Only TIME
07:40:57
General datetime
1970-01-05 07:40:57Z
For Database
1970-01-05 07:40:57
For HTTP1.1
Mon, 05 Jan 1970 07:40:57 GMT