"Sat, 14 Feb 1970 07:12:30"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700214
Only TIME
07:12:30
General datetime
1970-02-14 07:12:30Z
For Database
1970-02-14 07:12:30
For HTTP1.1
Sat, 14 Feb 1970 07:12:30 GMT