"Mon, 12 Jan 1970 07:40:12"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700112
Only TIME
07:40:12
General datetime
1970-01-12 07:40:12Z
For Database
1970-01-12 07:40:12
For HTTP1.1
Mon, 12 Jan 1970 07:40:12 GMT