"Thu, 01 Jan 1970 19:45:46"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700101
Only TIME
19:45:46
General datetime
1970-01-01 19:45:46Z
For Database
1970-01-01 19:45:46
For HTTP1.1
Thu, 01 Jan 1970 19:45:46 GMT