"Sat, 14 Feb 1970 00:53:18"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700214
Only TIME
00:53:18
General datetime
1970-02-14 00:53:18Z
For Database
1970-02-14 00:53:18
For HTTP1.1
Sat, 14 Feb 1970 00:53:18 GMT