"Mon, 26 Jan 1970 18:15:50"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700126
Only TIME
18:15:50
General datetime
1970-01-26 18:15:50Z
For Database
1970-01-26 18:15:50
For HTTP1.1
Mon, 26 Jan 1970 18:15:50 GMT