"Thu, 29 Jan 1970 23:30:42"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700129
Only TIME
23:30:42
General datetime
1970-01-29 23:30:42Z
For Database
1970-01-29 23:30:42
For HTTP1.1
Thu, 29 Jan 1970 23:30:42 GMT