"Thu, 01 Jan 1970 19:40:05"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700101
Only TIME
19:40:05
General datetime
1970-01-01 19:40:05Z
For Database
1970-01-01 19:40:05
For HTTP1.1
Thu, 01 Jan 1970 19:40:05 GMT