"Sat, 14 Feb 1970 03:26:16"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700214
Only TIME
03:26:16
General datetime
1970-02-14 03:26:16Z
For Database
1970-02-14 03:26:16
For HTTP1.1
Sat, 14 Feb 1970 03:26:16 GMT