"Sat, 28 Feb 1970 12:03:07"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700228
Only TIME
12:03:07
General datetime
1970-02-28 12:03:07Z
For Database
1970-02-28 12:03:07
For HTTP1.1
Sat, 28 Feb 1970 12:03:07 GMT