"Wed, 14 Jan 1970 09:15:35"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700114
Only TIME
09:15:35
General datetime
1970-01-14 09:15:35Z
For Database
1970-01-14 09:15:35
For HTTP1.1
Wed, 14 Jan 1970 09:15:35 GMT