hi… 
The content is the same as the title…
Can i using rfc3339 format when i insert data?
If possible, what is my problem?
Please let me know…!! 
No, you can’t
The timestamp for your data point in nanosecond-precision Unix time. The timestamp is optional in line protocol. If you do not specify a timestamp for your data point InfluxDB uses the server’s local nanosecond timestamp in UTC.
thanks!!
Have a nice day~!