"Thu, 29 Jan 1970 22:40:56"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700129
Only TIME
22:40:56
General datetime
1970-01-29 22:40:56Z
For Database
1970-01-29 22:40:56
For HTTP1.1
Thu, 29 Jan 1970 22:40:56 GMT