"Thu, 29 Jan 1970 14:11:40"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700129
Only TIME
14:11:40
General datetime
1970-01-29 14:11:40Z
For Database
1970-01-29 14:11:40
For HTTP1.1
Thu, 29 Jan 1970 14:11:40 GMT