"Sat, 14 Feb 1970 11:25:15"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700214
Only TIME
11:25:15
General datetime
1970-02-14 11:25:15Z
For Database
1970-02-14 11:25:15
For HTTP1.1
Sat, 14 Feb 1970 11:25:15 GMT