"Wed, 07 Jan 1970 15:16:57"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700107
Only TIME
15:16:57
General datetime
1970-01-07 15:16:57Z
For Database
1970-01-07 15:16:57
For HTTP1.1
Wed, 07 Jan 1970 15:16:57 GMT