"Wed, 28 Jan 1970 19:40:55"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700128
Only TIME
19:40:55
General datetime
1970-01-28 19:40:55Z
For Database
1970-01-28 19:40:55
For HTTP1.1
Wed, 28 Jan 1970 19:40:55 GMT