"Mon, 19 Jan 1970 23:38:30"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700119
Only TIME
23:38:30
General datetime
1970-01-19 23:38:30Z
For Database
1970-01-19 23:38:30
For HTTP1.1
Mon, 19 Jan 1970 23:38:30 GMT