"Wed, 07 Jan 1970 09:59:20"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700107
Only TIME
09:59:20
General datetime
1970-01-07 09:59:20Z
For Database
1970-01-07 09:59:20
For HTTP1.1
Wed, 07 Jan 1970 09:59:20 GMT