"Mon, 05 Jan 1970 00:40:04"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700105
Only TIME
00:40:04
General datetime
1970-01-05 00:40:04Z
For Database
1970-01-05 00:40:04
For HTTP1.1
Mon, 05 Jan 1970 00:40:04 GMT