"Mon, 26 Jan 1970 21:45:36"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700126
Only TIME
21:45:36
General datetime
1970-01-26 21:45:36Z
For Database
1970-01-26 21:45:36
For HTTP1.1
Mon, 26 Jan 1970 21:45:36 GMT