"Wed, 14 Jan 1970 19:45:55"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700114
Only TIME
19:45:55
General datetime
1970-01-14 19:45:55Z
For Database
1970-01-14 19:45:55
For HTTP1.1
Wed, 14 Jan 1970 19:45:55 GMT