"Thu, 29 Jan 1970 20:38:01"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700129
Only TIME
20:38:01
General datetime
1970-01-29 20:38:01Z
For Database
1970-01-29 20:38:01
For HTTP1.1
Thu, 29 Jan 1970 20:38:01 GMT