"Wed, 07 Jan 1970 20:44:06"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700107
Only TIME
20:44:06
General datetime
1970-01-07 20:44:06Z
For Database
1970-01-07 20:44:06
For HTTP1.1
Wed, 07 Jan 1970 20:44:06 GMT