"Wed, 07 Jan 1970 20:36:55"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700107
Only TIME
20:36:55
General datetime
1970-01-07 20:36:55Z
For Database
1970-01-07 20:36:55
For HTTP1.1
Wed, 07 Jan 1970 20:36:55 GMT