"Sat, 28 Feb 1970 12:03:12"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700228
Only TIME
12:03:12
General datetime
1970-02-28 12:03:12Z
For Database
1970-02-28 12:03:12
For HTTP1.1
Sat, 28 Feb 1970 12:03:12 GMT