"Sat, 14 Feb 1970 12:54:06"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700214
Only TIME
12:54:06
General datetime
1970-02-14 12:54:06Z
For Database
1970-02-14 12:54:06
For HTTP1.1
Sat, 14 Feb 1970 12:54:06 GMT