"Mon, 19 Jan 1970 07:50:40"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700119
Only TIME
07:50:40
General datetime
1970-01-19 07:50:40Z
For Database
1970-01-19 07:50:40
For HTTP1.1
Mon, 19 Jan 1970 07:50:40 GMT