"Tue, 03 Feb 1970 11:04:20"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700203
Only TIME
11:04:20
General datetime
1970-02-03 11:04:20Z
For Database
1970-02-03 11:04:20
For HTTP1.1
Tue, 03 Feb 1970 11:04:20 GMT