"Wed, 07 Jan 1970 18:03:55"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700107
Only TIME
18:03:55
General datetime
1970-01-07 18:03:55Z
For Database
1970-01-07 18:03:55
For HTTP1.1
Wed, 07 Jan 1970 18:03:55 GMT