"Wed, 14 Jan 1970 18:24:44"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700114
Only TIME
18:24:44
General datetime
1970-01-14 18:24:44Z
For Database
1970-01-14 18:24:44
For HTTP1.1
Wed, 14 Jan 1970 18:24:44 GMT