"Wed, 07 Jan 1970 12:31:46"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700107
Only TIME
12:31:46
General datetime
1970-01-07 12:31:46Z
For Database
1970-01-07 12:31:46
For HTTP1.1
Wed, 07 Jan 1970 12:31:46 GMT