"Thu, 29 Jan 1970 20:35:33"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700129
Only TIME
20:35:33
General datetime
1970-01-29 20:35:33Z
For Database
1970-01-29 20:35:33
For HTTP1.1
Thu, 29 Jan 1970 20:35:33 GMT