"Thu, 29 Jan 1970 20:35:46"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700129
Only TIME
20:35:46
General datetime
1970-01-29 20:35:46Z
For Database
1970-01-29 20:35:46
For HTTP1.1
Thu, 29 Jan 1970 20:35:46 GMT